X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1e9798d5699ca67718fd3b0d6baa9abcf27e6cd3..ea6cfe9ebd960e2cb4573c2c6f02b02931ac1f86:/src/output.c diff --git a/src/output.c b/src/output.c index 54ec5c19..702f0cb1 100644 --- a/src/output.c +++ b/src/output.c @@ -1,5 +1,6 @@ /* Output the generated parsing program for bison, - Copyright (C) 1984, 1986, 1989, 1992, 2000 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 "quotearg.h" +#include "error.h" #include "getargs.h" -#include "xalloc.h" #include "files.h" #include "gram.h" #include "LR0.h" @@ -100,242 +99,140 @@ #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; -static short **froms; -static short **tos; -static short *tally; -static short *width; -static short *actrow; -static short *state_count; -static short *order; -static short *base; -static short *pos; -static short *table; -static short *check; +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; +int error_verbose = 0; -static inline void -output_short_table (FILE *out, - const char *comment, - const char *table_name, - short *short_table, - short first_value, - short begin, short end) +/* Returns the number of lines of S. */ +size_t +get_lines_number (const char *s) { - int i, j; - - if (comment) - fprintf (out, "/* %s. */\n", comment); - - fprintf (out, "static const short %s[] =\n{\n %6d", - table_name, first_value); - - j = 1; - for (i = begin; i < end; i++) - { - putc (',', out); - - if (j >= 10) - { - fputs ("\n ", out); - j = 1; - } - else - { - j++; - } + size_t lines = 0; - fprintf (out, "%6d", short_table[i]); - } + size_t i; + for (i = 0; s[i]; ++i) + if (s[i] == '\n') + ++lines; - fprintf (out, "\n};\n"); + return lines; } -/*--------------------------------------------------------------. -| output_headers -- Output constant strings to the beginning of | -| certain files. | -`--------------------------------------------------------------*/ - -#define GUARDSTR \ -"\n\ -#include \"%s\"\n\ -extern int yyerror;\n\ -extern int yycost;\n\ -extern char * yymsg;\n\ -extern YYSTYPE yyval;\n\ -\n\ -yyguard(n, yyvsp, yylsp)\n\ -register int n;\n\ -register YYSTYPE *yyvsp;\n\ -register YYLTYPE *yylsp;\n\ -{\n\ - yyerror = 0;\n\ - yycost = 0;\n\ - yymsg = 0;\n\ - switch (n)\n\ - {" - -#define ACTSTR \ -"\n\ -#include \"%s\"\n\ -extern YYSTYPE yyval;\n\ -extern int yychar;\n\ -\n\ -yyaction(n, yyvsp, yylsp)\n\ -register int n;\n\ -register YYSTYPE *yyvsp;\n\ -register YYLTYPE *yylsp;\n\ -{\n\ - switch (n)\n\ - {" - -#define ACTSTR_SIMPLE "\n switch (yyn) {\n" +/* FIXME. */ -void -output_headers (void) +static inline void +output_table_data (struct obstack *oout, + short *table_data, + short first, + int begin, + int end) { - if (semantic_parser) - fprintf (fguard, GUARDSTR, attrsfile); - - if (no_parser_flag) - return; - - fprintf (faction, (semantic_parser ? ACTSTR : ACTSTR_SIMPLE), attrsfile); -/* if (semantic_parser) JF moved this below - fprintf(ftable, "#include \"%s\"\n", attrsfile); - fprintf(ftable, "#include \n\n"); -*/ + int i; + int j = 1; - /* Rename certain symbols if -p was specified. */ - if (spec_name_prefix) + obstack_fgrow1 (oout, "%6d", first); + for (i = begin; i < end; ++i) { - fprintf (ftable, "#define yyparse %sparse\n", spec_name_prefix); - fprintf (ftable, "#define yylex %slex\n", spec_name_prefix); - fprintf (ftable, "#define yyerror %serror\n", spec_name_prefix); - fprintf (ftable, "#define yylval %slval\n", spec_name_prefix); - fprintf (ftable, "#define yychar %schar\n", spec_name_prefix); - fprintf (ftable, "#define yydebug %sdebug\n", spec_name_prefix); - fprintf (ftable, "#define yynerrs %snerrs\n", spec_name_prefix); + 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); } -/*-------------------------------------------------------. -| Output constant strings to the ends of certain files. | -`-------------------------------------------------------*/ - -void -output_trailers (void) -{ - if (semantic_parser) - fprintf (fguard, "\n }\n}\n"); - - fprintf (faction, "\n"); - - if (no_parser_flag) - return; - - if (semantic_parser) - fprintf (faction, " }\n"); - fprintf (faction, "}\n"); -} - - - static void output_token_translations (void) { - int i, j; -/* short *sp; JF unused */ - - if (translations) - { - fprintf (ftable, - "\n#define YYTRANSLATE(x) ((unsigned)(x) <= %d ? yytranslate[x] : %d)\n", - max_user_token_number, nsyms); - - if (ntokens < 127) /* play it very safe; check maximum element value. */ - fprintf (ftable, "\nstatic const char yytranslate[] = { 0"); - else - fprintf (ftable, "\nstatic const short yytranslate[] = { 0"); - - j = 10; - for (i = 1; i <= max_user_token_number; i++) - { - putc (',', ftable); - - if (j >= 10) - { - putc ('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf (ftable, "%6d", token_translations[i]); - } - - fprintf (ftable, "\n};\n"); - } - else - { - fprintf (ftable, "\n#define YYTRANSLATE(x) (x)\n"); - } + output_table_data (&format_obstack, token_translations, + 0, 1, max_user_token_number + 1); + muscle_insert ("translate", obstack_finish (&format_obstack)); + XFREE (token_translations); } static void output_gram (void) { - /* With the ordinary parser, - yyprhs and yyrhs are needed only for yydebug. */ - /* With the no_parser option, all tables are generated */ - if (!semantic_parser && !no_parser_flag) - fprintf (ftable, "\n#if YYDEBUG != 0\n"); + { + 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); + } - output_short_table (ftable, NULL, "yyprhs", rrhs, - 0, 1, nrules + 1); + muscle_insert ("prhs", obstack_finish (&format_obstack)); { - size_t yyrhs_size = 1; - short *yyrhs, *sp; + short *yyrhs; int i; - for (sp = ritem + 1; *sp; sp++) - ++yyrhs_size; - yyrhs = XMALLOC (short, yyrhs_size); + yyrhs = XMALLOC (short, nritems); - for (sp = ritem + 1, i = 1; *sp; ++sp, ++i) - yyrhs[i] = *sp > 0 ? *sp : 0; + 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)); - output_short_table (ftable, NULL, "yyrhs", yyrhs, - ritem[0], 1, yyrhs_size); XFREE (yyrhs); } - if (!semantic_parser && !no_parser_flag) - fprintf (ftable, "\n#endif\n"); +#if 0 + if (!semantic_parser) + obstack_sgrow (&table_obstack, "\n#endif\n"); +#endif } static void output_stos (void) { - output_short_table (ftable, NULL, "yystos", accessing_symbol, - 0, 1, nstates); + int 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)); } @@ -346,142 +243,79 @@ output_rule_data (void) int j; short *short_tab = NULL; - fputs ("\n\ -#if YYDEBUG != 0\n", - ftable); - - output_short_table (ftable, - "YYRLINE[YYN] -- source line where rule number YYN was defined", - "yyrline", rline, - 0, 1, nrules + 1); - - fputs ("#endif\n\n", ftable); - - if (token_table_flag || no_parser_flag) - { - fprintf (ftable, "#define YYNTOKENS %d\n", ntokens); - fprintf (ftable, "#define YYNNTS %d\n", nvars); - fprintf (ftable, "#define YYNRULES %d\n", nrules); - fprintf (ftable, "#define YYNSTATES %d\n", nstates); - fprintf (ftable, "#define YYMAXUTOK %d\n\n", max_user_token_number); - } + { + 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); + } - /* Output the table of symbol names. */ - if (!token_table_flag && !no_parser_flag) - fputs ("\n#if YYDEBUG != 0 || defined YYERROR_VERBOSE\n\n", ftable); - fputs ("\ -/* YYTNAME[TOKEN_NUM] -- String name of the token TOKEN_NUM. */\n", - ftable); - fprintf (ftable, - "static const char *const yytname[] =\n{\n "); j = 0; for (i = 0; i < nsyms; i++) - /* this used to be i<=nsyms, but that output a final "" symbol - almost by accident */ { + /* 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 = 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++; + int strsize = strlen (cp) + 2; if (j + strsize > 75) { - fputs ("\n ", ftable); + obstack_sgrow (&format_obstack, "\n "); j = 2; } - putc ('\"', ftable); - for (p = tags[i]; p && *p; p++) - { - if (*p == '"' || *p == '\\') - { - fprintf (ftable, "\\%c", *p); - } - else if (*p == '\n') - { - fprintf (ftable, "\\n"); - } - else if (*p == '\t') - { - fprintf (ftable, "\\t"); - } - else if (*p == '\b') - { - fprintf (ftable, "\\b"); - } - else if (*p < 040 || *p >= 0177) - { - fprintf (ftable, "\\%03o", *p); - } - else - { - putc (*p, ftable); - } - } - - fputs ("\", ", ftable); + obstack_sgrow (&format_obstack, cp); + obstack_sgrow (&format_obstack, ", "); j += strsize; } /* add a NULL entry to list of tokens */ - fprintf (ftable, "NULL\n};\n"); + obstack_sgrow (&format_obstack, "NULL"); - if (!token_table_flag && !no_parser_flag) - fprintf (ftable, "#endif\n\n"); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); /* Output YYTOKNUM. */ - if (token_table_flag) - { - output_short_table (ftable, - "YYTOKNUM[YYLEX] -- Index in YYTNAME corresponding to YYLEX", - "yytoknum", user_toknums, - 0, 1, ntokens + 1); - } + { + 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 YYR1. */ - output_short_table (ftable, - "YYR1[YYN] -- Symbol number of symbol that rule YYN derives", - "yyr1", rlhs, - 0, 1, nrules + 1); - XFREE (rlhs + 1); - putc ('\n', ftable); + /* 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 YYR2. */ short_tab = XMALLOC (short, nrules + 1); for (i = 1; i < nrules; i++) - short_tab[i] = rrhs[i + 1] - rrhs[i] - 1; - short_tab[nrules] = nitems - rrhs[nrules] - 1; - output_short_table (ftable, - "YYR2[YYN] -- Number of symbols composing right hand side of rule YYN", - "yyr2", short_tab, - 0, 1, nrules + 1); - putc ('\n', ftable); - + 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); - - XFREE (rrhs + 1); -} - - -static void -output_defines (void) -{ - fprintf (ftable, "\n\n#define\tYYFINAL\t\t%d\n", final_state); - fprintf (ftable, "#define\tYYFLAG\t\t%d\n", MINSHORT); - fprintf (ftable, "#define\tYYNTBASE\t%d\n", ntokens); } - /*------------------------------------------------------------------. | 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 | @@ -497,137 +331,84 @@ output_defines (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 = reduction_table[state]; - - if (redp) + if (redp->nreds >= 1) { - nreds = redp->nreds; - - if (nreds >= 1) - { - /* loop over all the rules available here which require - lookahead */ - m = lookaheads[state]; - n = lookaheads[state + 1]; - - for (i = n - 1; i >= m; i--) - { - rule = -LAruleno[i]; - wordp = LA + i * tokensetsize; - 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 (BITISSET (LA (state->lookaheadsp + i), j)) + actrow[j] = -LAruleno[state->lookaheadsp + i]; } - shiftp = shift_table[state]; - /* 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; + int symbol; + int shift_state = shiftp->shifts[i]; + if (!shift_state) + continue; - for (i = 0; i < k; i++) - { - shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; - - symbol = accessing_symbol[shift_state]; + 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 == error_token_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) + 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] = 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 (consistent[state]) + 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 = -LAruleno[state->lookaheadsp + i]; + int j; for (j = 0; j < ntokens; j++) - { - if (actrow[j] == rule) - count++; - } + if (actrow[j] == rule) + count++; if (count > max) { @@ -641,11 +422,10 @@ 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; } @@ -656,11 +436,9 @@ 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; } @@ -677,10 +455,8 @@ 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; @@ -689,13 +465,11 @@ 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; @@ -719,86 +493,145 @@ token_actions (void) actrow = XCALLOC (short, ntokens); for (i = 0; i < nstates; ++i) { - yydefact[i] = action_row (i); + yydefact[i] = action_row (states[i]); save_row (i); } - XFREE (actrow); - output_short_table (ftable, NULL, "yydefact", yydefact, - yydefact[0], 1, nstates); + output_table_data (&format_obstack, yydefact, + yydefact[0], 1, nstates); + muscle_insert ("defact", obstack_finish (&format_obstack)); + + XFREE (actrow); XFREE (yydefact); } -static void -free_shifts (void) -{ - shifts *sp, *sptmp; /* JF derefrenced freed ptr */ +/*-----------------------------. +| Output the actions to OOUT. | +`-----------------------------*/ - XFREE (shift_table); - - for (sp = first_shift; sp; sp = sptmp) - { - sptmp = sp->next; - XFREE (sp); - } +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 ? ";" : ""); + } } -static void -free_reductions (void) +/*----------------------------. +| Output the guards to OOUT. | +`----------------------------*/ + +void +guards_output (FILE *out) { - reductions *rp, *rptmp; /* JF fixed freed ptr */ + 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); + } +} - XFREE (reduction_table); - for (rp = first_reduction; rp; rp = rptmp) +/*---------------------------------------. +| Output the tokens definition to OOUT. | +`---------------------------------------*/ + +void +token_definitions_output (FILE *out) +{ + int i; + for (i = 0; i < ntokens; ++i) { - rptmp = rp->next; - XFREE (rp); + bucket *symbol = symbols[i]; + int number = symbol->user_token_number; + + if (number == SALIAS) + continue; + /* Skip error token. */ + if (symbol->value == 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, "# define %s\t%d\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); } } - static void save_column (int symbol, int default_state) { int i; - int m; - int n; short *sp; short *sp1; short *sp2; int count; - int symno; + int symno = symbol - ntokens + nstates; - m = goto_map[symbol]; - n = goto_map[symbol + 1]; + short begin = goto_map[symbol]; + short end = goto_map[symbol + 1]; count = 0; - for (i = m; i < n; i++) - { - if (to_state[i] != default_state) - count++; - } + for (i = begin; i < end; i++) + 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 = m; i < n; i++) - { - if (to_state[i] != default_state) - { - *sp1++ = from_state[i]; - *sp2++ = to_state[i]; - } - } + 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; @@ -808,13 +641,10 @@ 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]; + int m = goto_map[symbol]; + int n = goto_map[symbol + 1]; + int default_state = -1; + int max = 0; if (m == n) return -1; @@ -825,17 +655,12 @@ 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; } @@ -853,36 +678,23 @@ default_goto (int symbol) static void goto_actions (void) { - int i, j, k; + int i; + short *yydefgoto = XMALLOC (short, nsyms - ntokens); state_count = XCALLOC (short, nstates); - - k = default_goto (ntokens); - fprintf (ftable, "\nstatic const short yydefgoto[] = {%6d", k); - save_column (ntokens, k); - - j = 10; - for (i = ntokens + 1; i < nsyms; i++) + for (i = ntokens; i < nsyms; ++i) { - putc (',', ftable); - - if (j >= 10) - { - putc ('\n', ftable); - j = 1; - } - else - { - j++; - } - - k = default_goto (i); - fprintf (ftable, "%6d", k); - save_column (i, k); + int default_state = default_goto (i); + save_column (i, default_state); + yydefgoto[i - ntokens] = default_state; } - fprintf (ftable, "\n};\n"); + output_table_data (&format_obstack, yydefgoto, + yydefgoto[0], 1, nsyms - ntokens); + muscle_insert ("defgoto", obstack_finish (&format_obstack)); + XFREE (state_count); + XFREE (yydefgoto); } @@ -893,50 +705,41 @@ 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) return -1; @@ -945,16 +748,16 @@ 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; @@ -967,26 +770,19 @@ 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++) { @@ -999,10 +795,8 @@ pack_vector (int vector) } for (k = 0; ok && k < vector; k++) - { - if (pos[k] == j) - ok = 0; - } + if (pos[k] == j) + ok = 0; if (ok) { @@ -1022,9 +816,9 @@ 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; } @@ -1064,10 +858,8 @@ 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); @@ -1081,13 +873,15 @@ pack_table (void) static void output_base (void) { - output_short_table (ftable, NULL, "yypact", base, - base[0], 1, nstates); - - putc ('\n', ftable); + /* Output pact. */ + output_table_data (&format_obstack, base, + base[0], 1, nstates); + muscle_insert ("pact", obstack_finish (&format_obstack)); - output_short_table (ftable, NULL, "yypgoto", base, - base[nstates], nstates + 1, nvectors); + /* Output pgoto. */ + output_table_data (&format_obstack, base, + base[nstates], nstates + 1, nvectors); + muscle_insert ("pgoto", obstack_finish (&format_obstack)); XFREE (base); } @@ -1096,9 +890,9 @@ output_base (void) static void output_table (void) { - fprintf (ftable, "\n\n#define\tYYLAST\t\t%d\n\n\n", high); - output_short_table (ftable, NULL, "yytable", table, - table[0], 1, high + 1); + output_table_data (&format_obstack, table, + table[0], 1, high + 1); + muscle_insert ("table", obstack_finish (&format_obstack)); XFREE (table); } @@ -1106,8 +900,9 @@ output_table (void) static void output_check (void) { - output_short_table (ftable, NULL, "yycheck", check, - check[0], 1, high + 1); + output_table_data (&format_obstack, check, + check[0], 1, high + 1); + muscle_insert ("check", obstack_finish (&format_obstack)); XFREE (check); } @@ -1117,6 +912,7 @@ output_check (void) static void output_actions (void) { + int i; nvectors = nstates + nvars; froms = XCALLOC (short *, nvectors); @@ -1125,12 +921,8 @@ output_actions (void) width = XCALLOC (short, nvectors); token_actions (); - free_shifts (); - free_reductions (); - XFREE (lookaheads); XFREE (LA); XFREE (LAruleno); - XFREE (accessing_symbol); goto_actions (); XFREE (goto_map + ntokens); @@ -1139,131 +931,174 @@ output_actions (void) sort_actions (); pack_table (); - putc ('\n', ftable); + output_base (); output_table (); - putc ('\n', ftable); + output_check (); + + for (i = 0; i < nstates; ++i) + { + free (states[i]->shifts); + XFREE (states[i]->reductions); + free (states[i]->errs); + free (states[i]); + } + XFREE (states); } -/* copy the parser code into the ftable file at the end. */ + +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ static void -output_parser (void) +output_skeleton (void) { - int c; - static int number_of_dollar_signs = 0; -#ifdef DONTDEF - FILE *fpars; -#else -#define fpars fparser -#endif + /* Find the right skeleton file. */ + if (!skeleton) + { + if (semantic_parser) + skeleton = "bison.hairy"; + else + skeleton = "bison.simple"; + } - if (pure_parser) - fprintf (ftable, "#define YYPURE 1\n\n"); + /* Parse the skeleton file and output the needed parsers. */ + muscle_insert ("skeleton", skeleton); -#ifdef DONTDEF - /* JF no longer needed 'cuz open_extra_files changes the currently - open parser from bison.simple to bison.hairy */ - if (semantic_parser) - fpars = fparser; - else - fpars = fparser1; -#endif + /* Store the definition of all the muscles. */ + { + FILE *muscles_m4 = xfopen ("/tmp/muscles.m4", "w"); + /* There are no comments, especially not `#': we do want M4 expansion + after `#': think of CPP macros! */ + fprintf (muscles_m4, "m4_changecom()\n"); + fprintf (muscles_m4, "m4_init()\n"); - /* Loop over lines in the standard parser file. */ + fprintf (muscles_m4, "m4_define([b4_actions], \n[["); + actions_output (muscles_m4); + fprintf (muscles_m4, "]])\n\n"); - while (1) - { - int write_line = 1; - - c = getc (fpars); - - /* See if the line starts with `#line. - If so, set write_line to 0. */ - if (no_lines_flag) - if (c == '#') - { - c = getc (fpars); - if (c == 'l') - { - c = getc (fpars); - if (c == 'i') - { - c = getc (fpars); - if (c == 'n') - { - c = getc (fpars); - if (c == 'e') - write_line = 0; - else - fprintf (ftable, "#lin"); - } - else - fprintf (ftable, "#li"); - } - else - fprintf (ftable, "#l"); - } - else - fprintf (ftable, "#"); - } - - /* now write out the line... */ - for (; c != '\n' && c != EOF; c = getc (fpars)) - if (write_line) - { - if (c == '$') - { - number_of_dollar_signs++; - assert (number_of_dollar_signs == 1); - /* `$' in the parser file indicates where to put the actions. - Copy them in at this point. */ - rewind (faction); - for (c = getc (faction); c != EOF; c = getc (faction)) - putc (c, ftable); - /* Skip the end of the line containing `$'. */ - write_line = 0; - } - else - putc (c, ftable); - } - if (c == EOF) - break; - putc (c, ftable); - } - assert (number_of_dollar_signs == 1); + fprintf (muscles_m4, "m4_define([b4_guards], \n[["); + guards_output (muscles_m4); + fprintf (muscles_m4, "]])\n\n"); + + fprintf (muscles_m4, "m4_define([b4_tokendef], \n[["); + token_definitions_output (muscles_m4); + fprintf (muscles_m4, "]])\n\n"); + + muscles_m4_output (muscles_m4); + + fprintf (muscles_m4, "m4_wrap([m4_divert_pop(0)])\n"); + fprintf (muscles_m4, "m4_divert_push(0)dnl\n"); + xfclose (muscles_m4); + } + + /* Invoke m4 on the definition of the muscles, and the skeleton. */ + { + const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR"); + if (!bison_pkgdatadir) + bison_pkgdatadir = PKGDATADIR; + skel_in = readpipe ("m4", + "-I", + bison_pkgdatadir, + "m4sugar/m4sugar.m4", + "/tmp/muscles.m4", + skeleton, + NULL); + if (!skel_in) + error (EXIT_FAILURE, errno, "cannot run m4"); + skel_lex (); + } } static void -output_program (void) +prepare (void) { - int c; - - if (!no_lines_flag) - fprintf (ftable, "#line %d \"%s\"\n", lineno, infile); - - c = getc (finput); - while (c != EOF) - { - putc (c, ftable); - c = getc (finput); - } + MUSCLE_INSERT_INT ("last", high); + MUSCLE_INSERT_INT ("flag", MINSHORT); + 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 ("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 ("defines_flag", defines_flag); } +/*-------------------------. +| Output the header file. | +`-------------------------*/ static void -free_itemsets (void) +header_output (void) { - core *cp, *cptmp; - - XFREE (state_table); + 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); + + token_definitions_output (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 ? spec_name_prefix : "yy"); + + if (locations_flag) + { + fputs ("\n\n", out); + fprintf (out, "\ +#ifndef YYLTYPE\n\ +typedef struct yyltype\n\ +{\n\ + int first_line;\n\ + int first_column;\n\ + int last_line;\n\ + int last_column;\n\ +} yyltype;\n\ +# define YYLTYPE yyltype\n\ +#endif\n"); + if (!pure_parser) + fprintf (out, "\nextern YYLTYPE %slloc;\n", + spec_name_prefix ? spec_name_prefix : "yy"); + } - for (cp = first_state; cp; cp = cptmp) + if (semantic_parser) { - cptmp = cp->next; - XFREE (cp); + int i; + + for (i = ntokens; i < nsyms; i++) + /* don't make these for dummy nonterminals made by gensym. */ + if (*symbols[i]->tag != '@') + fprintf (out, "# define NT%s\t%d\n", symbols[i]->tag, i); } + + fprintf (out, "\n#endif /* not %s */\n", macro_name); + free (macro_name); + xfclose (out); } @@ -1274,52 +1109,33 @@ free_itemsets (void) void output (void) { - int c; + obstack_init (&format_obstack); - /* output_token_defines(ftable); / * JF put out token defines FIRST */ - if (!semantic_parser) /* JF Put out other stuff */ - { - rewind (fattrs); - while ((c = getc (fattrs)) != EOF) - putc (c, ftable); - } - reader_output_yylsp (ftable); - if (debug_flag) - fputs ("\ -#ifndef YYDEBUG\n\ -# define YYDEBUG 1\n\ -#endif\n\ -\n", - ftable); - - if (semantic_parser) - fprintf (ftable, "#include \"%s\"\n", attrsfile); - - if (!no_parser_flag) - fprintf (ftable, "#include \n\n"); - - /* Make "const" do nothing if not in ANSI C. */ - fputs ("\ -#ifndef __cplusplus\n\ -# ifndef __STDC__\n\ -# define const\n\ -# endif\n\ -#endif\n\ -\n", - ftable); - - free_itemsets (); - output_defines (); output_token_translations (); -/* if (semantic_parser) */ - /* This is now unconditional because debugging printouts can use it. */ output_gram (); + XFREE (ritem); if (semantic_parser) output_stos (); output_rule_data (); output_actions (); - if (!no_parser_flag) - output_parser (); - output_program (); + + prepare (); + /* Copy definitions in directive. */ + obstack_1grow (&attrs_obstack, 0); + muscle_insert ("prologue", obstack_finish (&attrs_obstack)); + + /* Process the selected skeleton file. */ + output_skeleton (); + + /* Output the header if needed. */ + + if (0) + header_output (); + + free (rules + 1); + obstack_free (&muscle_obstack, NULL); + obstack_free (&format_obstack, NULL); + obstack_free (&action_obstack, NULL); + obstack_free (&attrs_obstack, NULL); }