X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ff4423cc2856ccc63b0fc72430fdc095208e0b14..8b752b00fdaaa3802e4ab05a468f6cda4a9fa500:/src/output.c?ds=sidebyside diff --git a/src/output.c b/src/output.c index f4b3c3fd..4a7a7265 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 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. @@ -19,82 +20,79 @@ 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 "xalloc.h" #include "files.h" #include "gram.h" #include "LR0.h" @@ -102,383 +100,308 @@ #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 unsigned int **conflict_tos = NULL; +static short *tally = NULL; +static short *width = NULL; +static short *actrow = NULL; +static short *conflrow = NULL; +static short *state_count = NULL; +static short *order = NULL; +static short *base = NULL; +static short *pos = NULL; + +static unsigned int *conflict_table = NULL; +static unsigned int *conflict_list = NULL; +static int conflict_list_cnt; +static int conflict_list_free; + +/* 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; +static struct obstack format_obstack; +int error_verbose = 0; -static inline void -output_short_or_char_table (struct obstack *oout, - const char *comment, - const char *type, - const char *table_name, - short *short_table, - short first_value, - short begin, short end) -{ - int i, j; - - if (comment) - obstack_fgrow1 (oout, "/* %s. */\n", comment); - - obstack_fgrow3 (oout, "static const %s %s[] =\n{\n %6d", - type, table_name, first_value); - - j = 1; - for (i = begin; i < end; i++) - { - obstack_1grow (oout, ','); - - if (j >= 10) - { - obstack_sgrow (oout, "\n "); - j = 1; - } - else - { - j++; - } - - obstack_fgrow1 (oout, "%6d", short_table[i]); - } - - obstack_sgrow (oout, "\n};\n"); -} +/*----------------------------------------------------------------. +| 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_short_table (struct obstack *oout, - const char *comment, - const char *table_name, - short *short_table, - short first_value, - short begin, short end) -{ - output_short_or_char_table (oout, comment, "short", table_name, short_table, - first_value, begin, end); -} - - -/*--------------------------------------------------------------. -| output_headers -- Output constant strings to the beginning of | -| certain files. | -`--------------------------------------------------------------*/ - -/* Don't put the `%s' insides quotes, since it quotearg puts them. */ - -#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" - -void -output_headers (void) +static void +table_grow (size_t desired) { - char *attrsfile_quoted = quotearg_style (c_quoting_style, attrsfile); + size_t old_size = table_size; - if (semantic_parser) - obstack_fgrow1 (&guard_obstack, GUARDSTR, attrsfile_quoted); + while (table_size <= desired) + table_size *= 2; - if (no_parser_flag) - return; + if (trace_flag) + fprintf (stderr, "growing table and check from: %d to %d\n", + old_size, table_size); - if (semantic_parser) - obstack_fgrow1 (&action_obstack, ACTSTR, attrsfile_quoted); - else - obstack_sgrow (&action_obstack, ACTSTR_SIMPLE); + table = XREALLOC (table, short, table_size); + check = XREALLOC (check, short, table_size); + if (glr_parser) + conflict_table = XREALLOC (conflict_table, unsigned int, table_size); - /* Rename certain symbols if -p was specified. */ - if (spec_name_prefix) + for (/* Nothing. */; old_size < table_size; ++old_size) { - obstack_fgrow1 (&table_obstack, - "#define yyparse %sparse\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yylex %slex\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yyerror %serror\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yylval %slval\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yychar %schar\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yydebug %sdebug\n", spec_name_prefix); - obstack_fgrow1 (&table_obstack, - "#define yynerrs %snerrs\n", spec_name_prefix); + table[old_size] = 0; + check[old_size] = -1; } } -/*-------------------------------------------------------. -| Output constant strings to the ends of certain files. | -`-------------------------------------------------------*/ - -void -output_trailers (void) -{ - if (semantic_parser) - obstack_sgrow (&guard_obstack, "\n }\n}\n"); - - obstack_1grow (&action_obstack, '\n'); - - if (no_parser_flag) - return; +/*-------------------------------------------------------------------. +| Create a function NAME which associates to the muscle NAME the | +| result of formatting the FIRST and then TABLE_DATA[BEGIN..END[ (of | +| TYPE), and to the muscle NAME_max, the max value of the | +| TABLE_DATA. | +`-------------------------------------------------------------------*/ - if (semantic_parser) - obstack_sgrow (&action_obstack, " }\n"); - obstack_sgrow (&action_obstack, "}\n"); +#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \ + \ +static void \ +Name (const char *name, \ + Type *table_data, \ + Type first, \ + int begin, \ + int end) \ +{ \ + Type max = first; \ + int i; \ + int j = 1; \ + \ + obstack_fgrow1 (&format_obstack, "%6d", first); \ + for (i = begin; i < end; ++i) \ + { \ + obstack_1grow (&format_obstack, ','); \ + if (j >= 10) \ + { \ + obstack_sgrow (&format_obstack, "\n "); \ + j = 1; \ + } \ + else \ + ++j; \ + obstack_fgrow1 (&format_obstack, "%6d", table_data[i]); \ + if (table_data[i] > max) \ + max = table_data[i]; \ + } \ + obstack_1grow (&format_obstack, 0); \ + muscle_insert (name, obstack_finish (&format_obstack)); \ + \ + /* Build `NAME_max' in the obstack. */ \ + obstack_fgrow1 (&format_obstack, "%s_max", name); \ + obstack_1grow (&format_obstack, 0); \ + MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), \ + (long int) max); \ } +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number_t) -static void -output_token_translations (void) -{ - obstack_sgrow (&table_obstack, "\ -\n\ -/* YYRANSLATE(YYLEX) -- Bison token number corresponding to YYLEX. */\n"); - - if (translations) - { - obstack_fgrow2 (&table_obstack, - "#define YYTRANSLATE(x) ((unsigned)(x) <= %d ? yytranslate[x] : %d)\ -\n\ -\n", - max_user_token_number, nsyms); - - output_short_or_char_table (&table_obstack, - "YYRANSLATE[YYLEX] -- Bison token number corresponding to YYLEX", - ntokens < 127 ? "char" : "short", - "yytranslate", token_translations, - 0, 1, max_user_token_number + 1); - } - else - { - obstack_sgrow (&table_obstack, - "\n#define YYTRANSLATE(x) (x)\n"); - } -} - +/*-----------------------------------------------------------------. +| Prepare the muscles related to the tokens: translate, tname, and | +| toknum. | +`-----------------------------------------------------------------*/ static void -output_gram (void) +prepare_tokens (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) - obstack_sgrow (&table_obstack, "\n#if YYDEBUG != 0\n"); - - output_short_table (&table_obstack, NULL, "yyprhs", rrhs, - 0, 1, nrules + 1); + muscle_insert_symbol_number_table ("translate", + token_translations, + 0, 1, max_user_token_number + 1); { - size_t yyrhs_size = 1; - short *yyrhs, *sp; int i; + int j = 0; + for (i = 0; i < nsyms; i++) + { + /* Be sure not to use twice the same QUOTEARG slot: + SYMBOL_TAG_GET uses slot 0. */ + const char *cp = + quotearg_n_style (1, c_quoting_style, + symbols[i]->tag); + /* Width of the next token, including the two quotes, the coma + and the space. */ + int strsize = strlen (cp) + 2; + + if (j + strsize > 75) + { + obstack_sgrow (&format_obstack, "\n "); + j = 2; + } - 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; + 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"); - output_short_table (&table_obstack, NULL, "yyrhs", yyrhs, - ritem[0], 1, yyrhs_size); - XFREE (yyrhs); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); } - if (!semantic_parser && !no_parser_flag) - obstack_sgrow (&table_obstack, "\n#endif\n"); + /* Output YYTOKNUM. */ + { + int i; + short *values = XCALLOC (short, ntokens + 1); + for (i = 0; i < ntokens + 1; ++i) + values[i] = symbols[i]->user_token_number; + muscle_insert_short_table ("toknum", values, + 0, 1, ntokens + 1); + free (values); + } } +/*-------------------------------------------------------------. +| Prepare the muscles related to the rules: rhs, prhs, r1, r2, | +| rline, dprec, merger | +`-------------------------------------------------------------*/ + static void -output_stos (void) +prepare_rules (void) { - output_short_table (&table_obstack, NULL, "yystos", accessing_symbol, - 0, 1, nstates); + rule_number_t r; + unsigned int i = 0; + item_number_t *rhs = XMALLOC (item_number_t, nritems); + unsigned int *prhs = XMALLOC (unsigned int, nrules + 1); + unsigned int *rline = XMALLOC (unsigned int, nrules + 1); + symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules + 1); + unsigned int *r2 = XMALLOC (unsigned int, nrules + 1); + short *dprec = XMALLOC (short, nrules + 1); + short *merger = XMALLOC (short, nrules + 1); + + for (r = 1; r < nrules + 1; ++r) + { + item_number_t *rhsp = NULL; + /* Index of rule R in RHS. */ + prhs[r] = i; + /* RHS of the rule R. */ + for (rhsp = rules[r].rhs; *rhsp >= 0; ++rhsp) + rhs[i++] = *rhsp; + /* LHS of the rule R. */ + r1[r] = rules[r].lhs->number; + /* Length of rule R's RHS. */ + r2[r] = i - prhs[r]; + /* Separator in RHS. */ + rhs[i++] = -1; + /* Line where rule was defined. */ + rline[r] = rules[r].location.first_line; + /* Dynamic precedence (GLR) */ + dprec[r] = rules[r].dprec; + /* Merger-function index (GLR) */ + merger[r] = rules[r].merger; + } + assert (i == nritems); + + muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems); + muscle_insert_unsigned_int_table ("prhs", prhs, 0, 1, nrules + 1); + muscle_insert_unsigned_int_table ("rline", rline, 0, 1, nrules + 1); + muscle_insert_symbol_number_table ("r1", r1, 0, 1, nrules + 1); + muscle_insert_unsigned_int_table ("r2", r2, 0, 1, nrules + 1); + muscle_insert_short_table ("dprec", dprec, 0, 1, nrules + 1); + muscle_insert_short_table ("merger", merger, 0, 1, nrules + 1); + + free (rhs); + free (prhs); + free (rline); + free (r1); + free (r2); + free (dprec); + free (merger); } +/*--------------------------------------------. +| Prepare the muscles related to the states. | +`--------------------------------------------*/ static void -output_rule_data (void) +prepare_states (void) { - int i; - int j; - short *short_tab = NULL; - - obstack_sgrow (&table_obstack, "\n\ -#if YYDEBUG != 0\n"); - - output_short_table (&table_obstack, - "YYRLINE[YYN] -- source line where rule number YYN was defined", - "yyrline", rline, - 0, 1, nrules + 1); - - obstack_sgrow (&table_obstack, "#endif\n\n"); - - if (token_table_flag || no_parser_flag) - { - obstack_fgrow1 (&table_obstack, "#define YYNTOKENS %d\n", ntokens); - obstack_fgrow1 (&table_obstack, "#define YYNNTS %d\n", nvars); - obstack_fgrow1 (&table_obstack, "#define YYNRULES %d\n", nrules); - obstack_fgrow1 (&table_obstack, "#define YYNSTATES %d\n", nstates); - obstack_fgrow1 (&table_obstack, "#define YYMAXUTOK %d\n\n", - max_user_token_number); - } - - /* Output the table of symbol names. */ - if (!token_table_flag && !no_parser_flag) - obstack_sgrow (&table_obstack, - "\n#if YYDEBUG != 0 || defined YYERROR_VERBOSE\n\n"); - obstack_sgrow (&table_obstack, "\ -/* YYTNAME[TOKEN_NUM] -- String name of the token TOKEN_NUM. */\n"); - obstack_sgrow (&table_obstack, - "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 */ - { - /* 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 (&table_obstack, "\n "); - j = 2; - } + state_number_t i; + symbol_number_t *values = + (symbol_number_t *) alloca (sizeof (symbol_number_t) * nstates); + for (i = 0; i < nstates; ++i) + values[i] = states[i]->accessing_symbol; + muscle_insert_symbol_number_table ("stos", values, + 0, 1, nstates); +} - obstack_1grow (&table_obstack, '\"'); - for (p = tags[i]; p && *p; p++) - { - if (*p == '"' || *p == '\\') - obstack_fgrow1 (&table_obstack, "\\%c", *p); - else if (*p == '\n') - obstack_sgrow (&table_obstack, "\\n"); - else if (*p == '\t') - obstack_sgrow (&table_obstack, "\\t"); - else if (*p == '\b') - obstack_sgrow (&table_obstack, "\\b"); - else if (*p < 040 || *p >= 0177) - obstack_fgrow1 (&table_obstack, "\\%03o", *p); - else - obstack_1grow (&table_obstack, *p); - } - obstack_sgrow (&table_obstack, "\", "); - j += strsize; - } - /* add a NULL entry to list of tokens */ - obstack_sgrow (&table_obstack, "NULL\n};\n"); +/*-------------------------------------------------------------------. +| For GLR parsers, for each conflicted token in STATE, as indicated | +| by non-zero entries in conflrow, create a list of possible | +| reductions that are alternatives to the shift or reduction | +| currently recorded for that token in STATE. Store the alternative | +| reductions followed by a 0 in conflict_list, updating | +| conflict_list_cnt, and storing an index to the start of the list | +| back into conflrow. | +`-------------------------------------------------------------------*/ - if (!token_table_flag && !no_parser_flag) - obstack_sgrow (&table_obstack, "#endif\n\n"); +static void +conflict_row (state_t *state) +{ + int i, j; - /* Output YYTOKNUM. */ - if (token_table_flag) - { - output_short_table (&table_obstack, - "YYTOKNUM[YYLEX] -- Index in YYTNAME corresponding to YYLEX", - "yytoknum", user_toknums, - 0, 1, ntokens + 1); - } + if (! glr_parser) + return; - /* Output YYR1. */ - output_short_table (&table_obstack, - "YYR1[YYN] -- Symbol number of symbol that rule YYN derives", - "yyr1", rlhs, - 0, 1, nrules + 1); - XFREE (rlhs + 1); - - obstack_1grow (&table_obstack, '\n'); - - /* 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 (&table_obstack, - "YYR2[YYN] -- Number of symbols composing right hand side of rule YYN", - "yyr2", short_tab, - 0, 1, nrules + 1); - obstack_1grow (&table_obstack, '\n'); - - XFREE (short_tab); - - XFREE (rrhs + 1); -} + for (j = 0; j < ntokens; j += 1) + if (conflrow[j]) + { + conflrow[j] = conflict_list_cnt; + /* find all reductions for token j, and record all that do + * not match actrow[j] */ + for (i = 0; i < state->nlookaheads; i += 1) + if (bitset_test (state->lookaheads[i], j) + && actrow[j] != -state->lookaheads_rule[i]->number) + { + assert (conflict_list_free > 0); + conflict_list[conflict_list_cnt] + = state->lookaheads_rule[i]->number; + conflict_list_cnt += 1; + conflict_list_free -= 1; + } -static void -output_defines (void) -{ - obstack_fgrow1 (&table_obstack, "\n\n#define\tYYFINAL\t\t%d\n", final_state); - obstack_fgrow1 (&table_obstack, "#define\tYYFLAG\t\t%d\n", MINSHORT); - obstack_fgrow1 (&table_obstack, "#define\tYYNTBASE\t%d\n", ntokens); + /* Leave a 0 at the end */ + assert (conflict_list_free > 0); + conflict_list_cnt += 1; + conflict_list_free -= 1; + } } @@ -488,146 +411,99 @@ output_defines (void) | 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 | | rules considered lower-numbered rules last, and the last rule | | considered that likes a token gets to handle it. | +| | +| For GLR parsers, also sets conflrow[SYM] to an index into | +| conflict_list iff there is an unresolved conflict (s/r or r/r) | +| with symbol SYM. The default reduction is not used for a symbol | +| that has any such conflicts. | `------------------------------------------------------------------*/ 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 */ + rule_number_t default_rule = 0; + reductions_t *redp = state->reductions; + transitions_t *transitions = state->transitions; + errs_t *errp = state->errs; + /* set nonzero to inhibit having any default reduction */ + int nodefault = 0; + int conflicted = 0; for (i = 0; i < ntokens; i++) - actrow[i] = 0; - - default_rule = 0; - nreds = 0; - redp = reduction_table[state]; + actrow[i] = conflrow[i] = 0; - if (redp) + if (redp->num >= 1) { - nreds = redp->nreds; - - if (nreds >= 1) + int j; + bitset_iterator biter; + /* 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 */ + BITSET_FOR_EACH (biter, state->lookaheads[i], j, 0) { - /* 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++; - } - } - } + /* and record this rule as the rule to use if that + token follows. */ + if (actrow[j] != 0) + conflicted = conflrow[j] = 1; + actrow[j] = -state->lookaheads_rule[i]->number; } } - 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. */ + for (i = 0; i < transitions->num && TRANSITION_IS_SHIFT (transitions, i); i++) + if (!TRANSITION_IS_DISABLED (transitions, i)) + { + symbol_number_t symbol = TRANSITION_SYMBOL (transitions, i); + state_number_t shift_state = transitions->states[i]; - if (shiftp) - { - k = shiftp->nshifts; - - for (i = 0; i < k; i++) - { - shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; - - symbol = accessing_symbol[shift_state]; - - if (ISVAR (symbol)) - break; - - actrow[symbol] = shift_state; + if (actrow[symbol] != 0) + conflicted = conflrow[symbol] = 1; + actrow[symbol] = state_number_as_int (shift_state); - /* Do not use any default reduction if there is a shift for - error */ - if (symbol == error_token_number) - nodefault = 1; - } - } - - errp = err_table[state]; + /* Do not use any default reduction if there is a shift for + error */ + if (symbol == errtoken->number) + nodefault = 1; + } /* See which tokens are an explicit error in this state (due to - %nonassoc). For them, record MINSHORT as the action. */ - - if (errp) + %nonassoc). For them, record SHRT_MIN as the action. */ + for (i = 0; i < errp->num; i++) { - k = errp->nerrs; - - for (i = 0; i < k; i++) - { - symbol = errp->errs[i]; - actrow[symbol] = MINSHORT; - } + symbol_number_t symbol = errp->symbols[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->num >= 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; + rule_number_t rule = state->lookaheads_rule[i]->number; + symbol_number_t j; for (j = 0; j < ntokens; j++) - { - if (actrow[j] == rule) - count++; - } + if (actrow[j] == -rule) + count++; if (count > max) { @@ -636,18 +512,19 @@ action_row (int state) } } - /* actions which match the default are replaced with zero, - which means "use the default" */ + /* GLR parsers need space for conflict lists, so we can't + default conflicted entries. For non-conflicted entries + or as long as we are not building a GLR parser, + actions that match the default are replaced with zero, + which means "use the default". */ if (max > 0) { + int j; for (j = 0; j < ntokens; j++) - { - if (actrow[j] == default_rule) - actrow[j] = 0; - } - - default_rule = -default_rule; + if (actrow[j] == -default_rule + && ! (glr_parser && conflrow[j])) + actrow[j] = 0; } } } @@ -656,46 +533,50 @@ 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; + + if (conflicted) + conflict_row (state); return default_rule; } static void -save_row (int state) +save_row (state_number_t state) { - int i; + symbol_number_t i; int count; - short *sp; - short *sp1; - short *sp2; + short *sp = NULL; + short *sp1 = NULL; + short *sp2 = NULL; + unsigned int *sp3 = NULL; count = 0; for (i = 0; i < ntokens; i++) - { - if (actrow[i] != 0) - count++; - } + if (actrow[i] != 0) + count++; if (count == 0) return; froms[state] = sp1 = sp = XCALLOC (short, count); tos[state] = sp2 = XCALLOC (short, count); + if (glr_parser) + conflict_tos[state] = sp3 = XCALLOC (unsigned int, count); + else + conflict_tos[state] = NULL; for (i = 0; i < ntokens; i++) - { - if (actrow[i] != 0) - { - *sp1++ = i; - *sp2++ = actrow[i]; - } - } + if (actrow[i] != 0) + { + *sp1++ = i; + *sp2++ = actrow[i]; + if (glr_parser) + *sp3++ = conflrow[i]; + } tally[state] = count; width[state] = sp1[-1] - sp[0] + 1; @@ -713,132 +594,263 @@ save_row (int state) static void token_actions (void) { - int i; + state_number_t i; + int nconflict = conflicts_total_count (); + short *yydefact = XCALLOC (short, nstates); actrow = XCALLOC (short, ntokens); + + conflrow = XCALLOC (short, ntokens); + if (glr_parser) + { + conflict_list = XCALLOC (unsigned int, 1 + 2 * nconflict); + conflict_list_free = 2 * nconflict; + conflict_list_cnt = 1; + } + else + conflict_list_free = conflict_list_cnt = 0; + 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 (&table_obstack, - "YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE\n\ - doesn't specify something else to do. Zero means the default is an\n\ - error", - "yydefact", yydefact, - yydefact[0], 1, nstates); - obstack_1grow (&table_obstack, '\n'); + muscle_insert_short_table ("defact", yydefact, + yydefact[0], 1, nstates); + XFREE (actrow); + XFREE (conflrow); XFREE (yydefact); } -static void -free_shifts (void) +/*-----------------------------. +| Output the actions to OOUT. | +`-----------------------------*/ + +void +actions_output (FILE *out) { - shifts *sp, *sptmp; /* JF derefrenced freed ptr */ + rule_number_t r; - XFREE (shift_table); + fputs ("m4_define([b4_actions], \n[[", out); + for (r = 1; r < nrules + 1; ++r) + if (rules[r].action) + { + fprintf (out, " case %d:\n", r); + + if (!no_lines_flag) + fprintf (out, muscle_find ("linef"), + rules[r].action_location.first_line, + quotearg_style (c_quoting_style, + muscle_find ("filename"))); + fprintf (out, " %s\n break;\n\n", + rules[r].action); + } + fputs ("]])\n\n", out); +} - for (sp = first_shift; sp; sp = sptmp) +/*--------------------------------------. +| Output the merge functions to OUT. | +`--------------------------------------*/ + +static void +merger_output (FILE *out) +{ + int n; + merger_list* p; + + fputs ("m4_define([b4_mergers], \n[[", out); + for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next) { - sptmp = sp->next; - XFREE (sp); + if (p->type[0] == '\0') + fprintf (out, " case %d: yyval = %s (*yy0, *yy1); break;\n", + n, p->name); + else + fprintf (out, " case %d: yyval.%s = %s (*yy0, *yy1); break;\n", + n, p->type, p->name); } + fputs ("]])\n\n", out); } +/*---------------------------------------. +| Output the tokens definition to OOUT. | +`---------------------------------------*/ -static void -free_reductions (void) +void +token_definitions_output (FILE *out) { - reductions *rp, *rptmp; /* JF fixed freed ptr */ - - XFREE (reduction_table); + int i; + int first = 1; - for (rp = first_reduction; rp; rp = rptmp) + fputs ("m4_define([b4_tokens], \n[", out); + for (i = 0; i < ntokens; ++i) { - rptmp = rp->next; - XFREE (rp); + symbol_t *symbol = symbols[i]; + int number = symbol->user_token_number; + + /* At this stage, if there are literal aliases, they are part of + SYMBOLS, so we should not find symbols which are the aliases + here. */ + assert (number != USER_NUMBER_ALIAS); + + /* Skip error token. */ + if (symbol == errtoken) + continue; + + /* If this string has an alias, then it is necessarily the alias + which is to be output. */ + if (symbol->alias) + symbol = symbol->alias; + + /* Don't output literal chars or strings (when defined only as a + string). Note that must be done after the alias resolution: + think about `%token 'f' "f"'. */ + if (symbol->tag[0] == '\'' || symbol->tag[0] == '\"') + continue; + + /* 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); + + first = 0; } + fputs ("])\n\n", out); } +/*----------------------------------------. +| Output the symbol destructors to OOUT. | +`----------------------------------------*/ static void -save_column (int symbol, int default_state) +symbol_destructors_output (FILE *out) +{ + int i; + int first = 1; + + fputs ("m4_define([b4_symbol_destructors], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->destructor) + { + symbol_t *symbol = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + destructor, typename. */ + fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + first ? "" : ",\n", + infile, symbol->destructor_location.first_line, + symbol->tag, + symbol->number, + symbol->destructor, + symbol->type_name); + + first = 0; + } + fputs ("])\n\n", out); +} + + +/*-------------------------------------. +| Output the symbol printers to OOUT. | +`-------------------------------------*/ + +static void +symbol_printers_output (FILE *out) +{ + int i; + int first = 1; + + fputs ("m4_define([b4_symbol_printers], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->destructor) + { + symbol_t *symbol = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + destructor, typename. */ + fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + first ? "" : ",\n", + infile, symbol->printer_location.first_line, + symbol->tag, + symbol->number, + symbol->printer, + symbol->type_name); + + first = 0; + } + fputs ("])\n\n", out); +} + + +static void +save_column (symbol_number_t symbol, state_number_t default_state) { int i; short *sp; short *sp1; short *sp2; int count; - int symno; + int symno = symbol - ntokens + state_number_as_int (nstates); - short begin = goto_map[symbol]; - short end = goto_map[symbol + 1]; + int begin = goto_map[symbol]; + int 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; } -static int -default_goto (int symbol) + +static state_number_t +default_goto (symbol_number_t symbol) { + state_number_t s; 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]; + state_number_t default_state = (state_number_t) -1; + int max = 0; if (m == n) - return -1; + return (state_number_t) -1; - for (i = 0; i < nstates; i++) - state_count[i] = 0; + for (s = 0; s < nstates; s++) + state_count[s] = 0; 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; - } - } + for (s = 0; s < nstates; s++) + if (state_count[s] > max) + { + max = state_count[s]; + default_state = s; + } return default_state; } @@ -856,21 +868,19 @@ default_goto (int symbol) static void goto_actions (void) { - int i; + symbol_number_t i; + state_number_t *yydefgoto = XMALLOC (state_number_t, nsyms - ntokens); - short *yydefgoto = XMALLOC (short, nsyms - ntokens); state_count = XCALLOC (short, nstates); - for (i = ntokens; i < nsyms; ++i) { - int default_state = default_goto (i); + state_number_t default_state = default_goto (i); save_column (i, default_state); yydefgoto[i - ntokens] = default_state; } - output_short_table (&table_obstack, NULL, "yydefgoto", yydefgoto, - yydefgoto[0], 1, nsyms - ntokens); - + muscle_insert_state_number_table ("defgoto", yydefgoto, + yydefgoto[0], 1, nsyms - ntokens); XFREE (state_count); XFREE (yydefgoto); } @@ -883,51 +893,42 @@ 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]; @@ -935,16 +936,16 @@ 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; @@ -957,50 +958,44 @@ 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]; + unsigned int *conflict_to = conflict_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); + loc = j + state_number_as_int (from[k]); + 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) { for (k = 0; k < t; k++) { - loc = j + from[k]; - table[loc] = to[k]; - check[loc] = from[k]; + loc = j + state_number_as_int (from[k]); + table[loc] = state_number_as_int (to[k]); + if (glr_parser && conflict_to != NULL) + conflict_table[loc] = conflict_to[k]; + check[loc] = state_number_as_int (from[k]); } while (table[lowzero] != 0) @@ -1012,9 +1007,9 @@ 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; } @@ -1027,16 +1022,18 @@ pack_table (void) base = XCALLOC (short, nvectors); pos = XCALLOC (short, nentries); - table = XCALLOC (short, MAXTABLE); - check = XCALLOC (short, MAXTABLE); + table = XCALLOC (short, table_size); + if (glr_parser) + conflict_table = XCALLOC (unsigned int, 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++) @@ -1054,31 +1051,30 @@ 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 (conflict_tos[i]); } XFREE (froms); XFREE (tos); + XFREE (conflict_tos); XFREE (pos); } -/* the following functions output yytable, yycheck +/* the following functions output yytable, yycheck, yyconflp, yyconfl, and the vectors whose elements index the portion starts */ static void output_base (void) { - output_short_table (&table_obstack, NULL, "yypact", base, - base[0], 1, nstates); - - obstack_1grow (&table_obstack, '\n'); - - output_short_table (&table_obstack, NULL, "yypgoto", base, - base[nstates], nstates + 1, nvectors); + /* Output pact. */ + muscle_insert_short_table ("pact", base, + base[0], 1, nstates); + /* Output pgoto. */ + muscle_insert_short_table ("pgoto", base, + base[nstates], nstates + 1, nvectors); XFREE (base); } @@ -1086,41 +1082,67 @@ output_base (void) static void output_table (void) { - obstack_fgrow1 (&table_obstack, "\n\n#define\tYYLAST\t\t%d\n\n\n", high); - output_short_table (&table_obstack, NULL, "yytable", table, - table[0], 1, high + 1); + muscle_insert_short_table ("table", table, + table[0], 1, high + 1); XFREE (table); } +static void +output_conflicts (void) +{ + /* GLR parsing slightly modifies yytable and yycheck + (and thus yypact) so that in states with unresolved conflicts, + the default reduction is not used in the conflicted entries, so + that there is a place to put a conflict pointer. This means that + yyconflp and yyconfl are nonsense for a non-GLR parser, so we + avoid accidents by not writing them out in that case. */ + if (! glr_parser) + return; + + muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table, + conflict_table[0], 1, high+1); + muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list, + conflict_list[0], 1, conflict_list_cnt); + + XFREE (conflict_table); + XFREE (conflict_list); +} + + static void output_check (void) { - output_short_table (&table_obstack, NULL, "yycheck", check, - check[0], 1, high + 1); + muscle_insert_short_table ("check", check, + check[0], 1, high + 1); 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) { - nvectors = nstates + nvars; + /* That's a poor way to make sure the sizes are properly corelated, + in particular the signedness is not taking into account, but it's + not useless. */ + assert (sizeof (nvectors) >= sizeof (nstates)); + assert (sizeof (nvectors) >= sizeof (nvars)); + + nvectors = state_number_as_int (nstates) + nvars; froms = XCALLOC (short *, nvectors); tos = XCALLOC (short *, nvectors); + conflict_tos = XCALLOC (unsigned int *, nvectors); tally = XCALLOC (short, nvectors); width = XCALLOC (short, nvectors); token_actions (); - free_shifts (); - free_reductions (); - XFREE (lookaheads); - XFREE (LA); - XFREE (LAruleno); - XFREE (accessing_symbol); + bitsetv_free (LA); + free (LArule); goto_actions (); XFREE (goto_map + ntokens); @@ -1129,173 +1151,152 @@ output_actions (void) sort_actions (); pack_table (); - obstack_1grow (&table_obstack, '\n'); + output_base (); output_table (); - obstack_1grow (&table_obstack, '\n'); + output_conflicts (); + output_check (); } -/*------------------------------------------. -| Copy the parser code into TABLE_OBSTACK. | -`------------------------------------------*/ + +/*----------------------. +| Run our backend, M4. | +`----------------------*/ static void -output_parser (void) +m4_invoke (const char *definitions) { - int c; - FILE *fskel; - size_t line; - const char *skeleton = NULL; - int actions_dumped = 0; - - if (pure_parser) - obstack_sgrow (&table_obstack, "#define YYPURE 1\n\n"); - - /* Loop over lines in the standard parser file. */ - if (semantic_parser) - skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY); + /* Invoke m4 on the definition of the muscles, and the skeleton. */ + const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR"); + const char *m4 = getenv ("M4"); + int pkg_data_len; + char *full_skeleton; + + if (!m4) + m4 = M4; + if (!bison_pkgdatadir) + bison_pkgdatadir = PKGDATADIR; + pkg_data_len = strlen (bison_pkgdatadir); + full_skeleton = XMALLOC (char, pkg_data_len + strlen (skeleton) + 2); + if (bison_pkgdatadir[pkg_data_len-1] == '/') + sprintf (full_skeleton, "%s%s", bison_pkgdatadir, skeleton); else - skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE); - fskel = xfopen (skeleton, "r"); - - /* Set LINE to 2, not 1: `#line LINENUM' -- Here LINENUM is a - decimal integer constant. This specifies that the line number of - the *following* line of input, in its original source file, was - LINENUM. */ - line = 2; - - while (1) - { - enum line_type_e - { - regular_line, - sync_line, /* #line. */ - actions_line /* %% actions. */ - }; - enum line_type_e line_type = regular_line; - - c = getc (fskel); - - /* Is this line special? */ - if (c == '#') - { - /* See if it's a `#line' line. */ - if ((c = getc (fskel)) == 'l') - if ((c = getc (fskel)) == 'i') - if ((c = getc (fskel)) == 'n') - if ((c = getc (fskel)) == 'e') - line_type = sync_line; - else - obstack_sgrow (&table_obstack, "#lin"); - else - obstack_sgrow (&table_obstack, "#li"); - else - obstack_sgrow (&table_obstack, "#l"); - else - obstack_sgrow (&table_obstack, "#"); - } - else if (c == '%') - { - /* See if it's a `%% actions' line. */ - if ((c = getc (fskel)) == '%') - if ((c = getc (fskel)) == ' ') - if ((c = getc (fskel)) == 'a') - if ((c = getc (fskel)) == 'c') - if ((c = getc (fskel)) == 't') - if ((c = getc (fskel)) == 'i') - if ((c = getc (fskel)) == 'o') - if ((c = getc (fskel)) == 'n') - if ((c = getc (fskel)) == 's') - line_type = actions_line; - else - obstack_sgrow (&table_obstack, "%% action"); - else - obstack_sgrow (&table_obstack, "%% actio"); - else - obstack_sgrow (&table_obstack, "%% acti"); - else - obstack_sgrow (&table_obstack, "%% act"); - else - obstack_sgrow (&table_obstack, "%% ac"); - else - obstack_sgrow (&table_obstack, "%% a"); - else - obstack_sgrow (&table_obstack, "%% "); - else - obstack_sgrow (&table_obstack, "%%"); - else - obstack_sgrow (&table_obstack, "%"); - } - - switch (line_type) - { - case sync_line: - if (!no_lines_flag) - obstack_fgrow2 (&table_obstack, "#line %d %s\n", - line, quotearg_style (c_quoting_style, skeleton)); - - /* Skip the end of line. */ - for (; c != '\n' && c != EOF; c = getc (fskel)) - /* nothing */; - break; - - case actions_line: - { - size_t size = obstack_object_size (&action_obstack); - - actions_dumped++; - assert (actions_dumped == 1); - obstack_grow (&table_obstack, - obstack_finish (&action_obstack), - size); - } - - /* Skip the end of line. */ - for (; c != '\n' && c != EOF; c = getc (fskel)) - /* nothing */; - break; + sprintf (full_skeleton, "%s/%s", bison_pkgdatadir, skeleton); + if (trace_flag) + fprintf (stderr, + "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n", + m4, bison_pkgdatadir, definitions, full_skeleton); + skel_in = readpipe (m4, + "-I", bison_pkgdatadir, + "m4sugar/m4sugar.m4", + definitions, + full_skeleton, + NULL); + XFREE (full_skeleton); + if (!skel_in) + error (EXIT_FAILURE, errno, "cannot run m4"); + skel_lex (); +} - case regular_line: - for (; c != '\n' && c != EOF; c = getc (fskel)) - obstack_1grow (&table_obstack, c); - } - if (c == EOF) - break; - obstack_1grow (&table_obstack, c); - line++; - } - assert (actions_dumped == 1); - xfclose (fskel); -} +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ static void -output_program (void) +output_skeleton (void) { - int c; - - if (!no_lines_flag) - obstack_fgrow2 (&table_obstack, "#line %d %s\n", - lineno, quotearg_style (c_quoting_style, infile)); - - while ((c = getc (finput)) != EOF) - obstack_1grow (&table_obstack, c); + /* 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); + + actions_output (out); + merger_output (out); + token_definitions_output (out); + symbol_destructors_output (out); + symbol_printers_output (out); + + muscles_m4_output (out); + + fputs ("m4_wrap([m4_divert_pop(0)])\n", out); + fputs ("m4_divert_push(0)dnl\n", out); + xfclose (out); + + m4_invoke (tempfile); + + /* If `debugging', keep this file alive. */ + if (!trace_flag) + unlink (tempfile); + + free (tempfile); } - static void -free_itemsets (void) +prepare (void) { - core *cp, *cptmp; - - XFREE (state_table); - - for (cp = first_state; cp; cp = cptmp) + MUSCLE_INSERT_INT ("last", high); + 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->number); + MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number); + MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number); + MUSCLE_INSERT_INT ("error_verbose", error_verbose); + MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); + + /* 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); + + /* Copy definitions in directive. */ + obstack_1grow (&pre_prologue_obstack, 0); + obstack_1grow (&post_prologue_obstack, 0); + muscle_insert ("pre_prologue", obstack_finish (&pre_prologue_obstack)); + muscle_insert ("post_prologue", obstack_finish (&post_prologue_obstack)); + + /* Find the right skeleton file. */ + if (!skeleton) { - cptmp = cp->next; - XFREE (cp); + if (glr_parser) + skeleton = "glr.c"; + else + skeleton = "yacc.c"; } + + /* Parse the skeleton file and output the needed parsers. */ + muscle_insert ("skeleton", skeleton); } @@ -1306,51 +1307,19 @@ free_itemsets (void) void output (void) { - /* output_token_defines(ftable); / * JF put out token defines FIRST */ + obstack_init (&format_obstack); - /* If using a simple parser the definition of YYSTYPE are put into - TABLE_OBSTACK. */ - if (!semantic_parser) - { - size_t size = obstack_object_size (&attrs_obstack); - obstack_grow (&table_obstack, obstack_finish (&attrs_obstack), size); - } - reader_output_yylsp (&table_obstack); - if (debug_flag) - obstack_sgrow (&table_obstack, "\ -#ifndef YYDEBUG\n\ -# define YYDEBUG 1\n\ -#endif\n\ -\n"); - - if (semantic_parser) - obstack_fgrow1 (&table_obstack, "#include %s\n", - quotearg_style (c_quoting_style, attrsfile)); - - if (!no_parser_flag) - obstack_sgrow (&table_obstack, "#include <stdio.h>\n\n"); - - /* Make "const" do nothing if not in ANSI C. */ - obstack_sgrow (&table_obstack, "\ -#ifndef __cplusplus\n\ -# ifndef __STDC__\n\ -# define const\n\ -# endif\n\ -#endif\n\ -\n"); - - 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 (); + prepare_tokens (); + prepare_rules (); + prepare_states (); output_actions (); - if (!no_parser_flag) - output_parser (); - output_program (); + + prepare (); + + /* Process the selected skeleton file. */ + output_skeleton (); + + obstack_free (&format_obstack, NULL); + obstack_free (&pre_prologue_obstack, NULL); + obstack_free (&post_prologue_obstack, NULL); }