X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a0f6b076110ea79f25e13701d7f0ee4b38630d4d..916708d59e02812675ce2d85597b7e1f2d677213:/src/output.c?ds=sidebyside diff --git a/src/output.c b/src/output.c index f7e21880..939775af 100644 --- a/src/output.c +++ b/src/output.c @@ -1,5 +1,7 @@ -/* Output the generated parsing program for bison, - Copyright (C) 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc. +/* Output the generated parsing program for Bison. + + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -19,1472 +21,630 @@ 02111-1307, USA. */ -/* functions to output parsing data to various files. Entries are: - - output_headers () - -Output constant strings to the beginning of certain files. - - output_trailers() - -Output constant strings to the ends of certain files. - - output () - -Output the parsing tables and the parser code to ftable. - -The parser tables consist of these tables. -Starred ones needed only for the semantic parser. -Double starred are output only if switches are set. - -yytranslate = vector mapping yylex's token numbers into bison's token numbers. - -** yytname = vector of string-names indexed by bison token number - -** yytoknum = vector of yylex token numbers corresponding to entries in yytname - -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. - -yyprhs[r] = index in yyrhs of first item for rule r. - -yyr1[r] = symbol number of symbol that rule r derives. - -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. - -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. - -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 is negative, it is minus a rule number to reduce by. - - 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. - -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. - - 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. +#include "system.h" -*/ +#include +#include +#include +#include +#include -#include -#include "system.h" -#include "machine.h" -#include "alloc.h" +#include "complain.h" #include "files.h" +#include "getargs.h" #include "gram.h" -#include "state.h" -#include "complain.h" - - -extern int debugflag; -extern int nolinesflag; -extern int noparserflag; -extern int toknumflag; - -extern char **tags; -extern int *user_toknums; -extern int tokensetsize; -extern int final_state; -extern core **state_table; -extern shifts **shift_table; -extern errs **err_table; -extern reductions **reduction_table; -extern short *accessing_symbol; -extern unsigned *LA; -extern short *LAruleno; -extern short *lookaheads; -extern char *consistent; -extern short *goto_map; -extern short *from_state; -extern short *to_state; - -void output_headers PARAMS((void)); -void output_trailers PARAMS((void)); -void output PARAMS((void)); -void output_token_translations PARAMS((void)); -void output_gram PARAMS((void)); -void output_stos PARAMS((void)); -void output_rule_data PARAMS((void)); -void output_defines PARAMS((void)); -void output_actions PARAMS((void)); -void token_actions PARAMS((void)); -void save_row PARAMS((int)); -void goto_actions PARAMS((void)); -void save_column PARAMS((int, int)); -void sort_actions PARAMS((void)); -void pack_table PARAMS((void)); -void output_base PARAMS((void)); -void output_table PARAMS((void)); -void output_check PARAMS((void)); -void output_parser PARAMS((void)); -void output_program PARAMS((void)); -void free_shifts PARAMS((void)); -void free_reductions PARAMS((void)); -void free_itemsets PARAMS((void)); -int action_row PARAMS((int)); -int default_goto PARAMS((int)); -int matching_state PARAMS((int)); -int pack_vector PARAMS((int)); - -extern void berror PARAMS((char *)); -extern void reader_output_yylsp PARAMS((FILE *)); - -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 int lowzero; -static int high; - - - -#define GUARDSTR "\n#include \"%s\"\nextern int yyerror;\n\ -extern int yycost;\nextern char * yymsg;\nextern YYSTYPE yyval;\n\n\ -yyguard(n, yyvsp, yylsp)\nregister int n;\nregister YYSTYPE *yyvsp;\n\ -register YYLTYPE *yylsp;\n\ -{\n yyerror = 0;\nyycost = 0;\n yymsg = 0;\nswitch (n)\n {" - -#define ACTSTR "\n#include \"%s\"\nextern YYSTYPE yyval;\ -\nextern int yychar;\ -yyaction(n, yyvsp, yylsp)\nregister int n;\nregister YYSTYPE *yyvsp;\n\ -register YYLTYPE *yylsp;\n{\n switch (n)\n{" - -#define ACTSTR_SIMPLE "\n switch (yyn) {\n" - - -void -output_headers (void) -{ - if (semantic_parser) - fprintf(fguard, GUARDSTR, attrsfile); - - if (noparserflag) - 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"); -*/ - - /* Rename certain symbols if -p was specified. */ - if (spec_name_prefix) - { - 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); - } +#include "muscle_tab.h" +#include "output.h" +#include "reader.h" +#include "symtab.h" +#include "tables.h" + +/* From src/scan-skel.l. */ +void scan_skel (FILE *); + + +static struct obstack format_obstack; + +int error_verbose = 0; + + + +/*-------------------------------------------------------------------. +| 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. | +`-------------------------------------------------------------------*/ + + +#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \ + \ +static void \ +Name (const char *name, \ + Type *table_data, \ + Type first, \ + int begin, \ + int end) \ +{ \ + Type min = first; \ + Type max = first; \ + long int lmin; \ + long int lmax; \ + 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] < min) \ + min = table_data[i]; \ + if (max < table_data[i]) \ + max = table_data[i]; \ + } \ + obstack_1grow (&format_obstack, 0); \ + muscle_insert (name, obstack_finish (&format_obstack)); \ + \ + lmin = min; \ + lmax = max; \ + /* Build `NAME_min' and `NAME_max' in the obstack. */ \ + obstack_fgrow1 (&format_obstack, "%s_min", name); \ + obstack_1grow (&format_obstack, 0); \ + MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmin); \ + obstack_fgrow1 (&format_obstack, "%s_max", name); \ + obstack_1grow (&format_obstack, 0); \ + MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), lmax); \ } +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_int_table, int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_base_table, base_number) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number) -void -output_trailers (void) -{ - if (semantic_parser) - fprintf(fguard, "\n }\n}\n"); - - fprintf(faction, "\n"); - - if (noparserflag) - return; - - if (semantic_parser) - fprintf(faction, " }\n"); - fprintf(faction, "}\n"); -} - - -void -output (void) -{ - int c; - - /* 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 (debugflag) - fprintf(ftable, "#ifndef YYDEBUG\n#define YYDEBUG %d\n#endif\n\n", - !!debugflag); - - if (semantic_parser) - fprintf(ftable, "#include \"%s\"\n", attrsfile); - - if (! noparserflag) - fprintf(ftable, "#include \n\n"); - - /* Make "const" do nothing if not in ANSI C. */ - fprintf (ftable, "#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(); - FREE(ritem); - if (semantic_parser) - output_stos(); - output_rule_data(); - output_actions(); - if (! noparserflag) - output_parser(); - output_program(); -} - - -void -output_token_translations (void) -{ - register int i, j; -/* register 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"); - } -} +/*----------------------------------------------------------------------. +| Print to OUT a representation of FILENAME escaped both for C and M4. | +`----------------------------------------------------------------------*/ -void -output_gram (void) +static void +escaped_file_name_output (FILE *out, char const *filename) { - register int i; - register int j; - register short *sp; - - /* With the ordinary parser, - yyprhs and yyrhs are needed only for yydebug. */ - /* With the noparser option, all tables are generated */ - if (! semantic_parser && ! noparserflag) - fprintf(ftable, "\n#if YYDEBUG != 0"); - - fprintf(ftable, "\nstatic const short yyprhs[] = { 0"); - - j = 10; - for (i = 1; i <= nrules; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", rrhs[i]); - } - - fprintf(ftable, "\n};\n"); - - fprintf(ftable, "\nstatic const short yyrhs[] = {%6d", ritem[0]); - - j = 10; - for (sp = ritem + 1; *sp; sp++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } + char const *p; + fprintf (out, "[["); - if (*sp > 0) - fprintf(ftable, "%6d", *sp); - else - fprintf(ftable, " 0"); - } - - fprintf(ftable, "\n};\n"); + for (p = quotearg_style (c_quoting_style, filename); *p; p++) + switch (*p) + { + case '$': fputs ("$][", out); break; + case '@': fputs ("@@", out); break; + case '[': fputs ("@{", out); break; + case ']': fputs ("@}", out); break; + default: fputc (*p, out); break; + } - if (! semantic_parser && ! noparserflag) - fprintf(ftable, "\n#endif\n"); + fprintf (out, "]]"); } -void -output_stos (void) -{ - register int i; - register int j; - - fprintf(ftable, "\nstatic const short yystos[] = { 0"); - - j = 10; - for (i = 1; i < nstates; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", accessing_symbol[i]); - } - - fprintf(ftable, "\n};\n"); -} - +/*------------------------------------------------------------------. +| Prepare the muscles related to the symbols: translate, tname, and | +| toknum. | +`------------------------------------------------------------------*/ -void -output_rule_data (void) +static void +prepare_symbols (void) { - register int i; - register int j; - - fputs ("\n\ -#if YYDEBUG != 0\n\ -/* YYRLINE[yyn]: source line where rule number YYN was defined. */\n\ -static const short yyrline[] = { 0", ftable); - - j = 10; - for (i = 1; i <= nrules; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", rline[i]); - } - fprintf(ftable, "\n};\n#endif\n\n"); - - if (toknumflag || noparserflag) - { - 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); - } - - if (! toknumflag && ! noparserflag) - fprintf(ftable, "\n#if YYDEBUG != 0 || defined (YYERROR_VERBOSE)\n\n"); - - /* Output the table of symbol names. */ - - fprintf(ftable, - "static const char * const yytname[] = { \"%s\"", - tags[0]); - - j = strlen (tags[0]) + 44; - for (i = 1; i < nsyms; i++) - /* this used to be i<=nsyms, but that output a final "" symbol - almost by accident */ - { - register char *p; - putc(',', ftable); - j++; - - if (j > 75) - { - putc('\n', ftable); - j = 0; - } - - putc ('\"', ftable); - j++; - - for (p = tags[i]; p && *p; p++) - { - if (*p == '"' || *p == '\\') - { - fprintf(ftable, "\\%c", *p); - j += 2; - } - else if (*p == '\n') - { - fprintf(ftable, "\\n"); - j += 2; - } - else if (*p == '\t') - { - fprintf(ftable, "\\t"); - j += 2; - } - else if (*p == '\b') - { - fprintf(ftable, "\\b"); - j += 2; - } - else if (*p < 040 || *p >= 0177) - { - fprintf(ftable, "\\%03o", *p); - j += 4; - } - else - { - putc(*p, ftable); - j++; - } - } - - putc ('\"', ftable); - j++; - } - /* add a NULL entry to list of tokens */ - fprintf (ftable, ", NULL\n};\n"); + MUSCLE_INSERT_INT ("tokens_number", ntokens); + MUSCLE_INSERT_INT ("nterms_number", nvars); + MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number); + MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number); + + muscle_insert_symbol_number_table ("translate", + token_translations, + token_translations[0], + 1, max_user_token_number + 1); + + /* tname -- token names. */ + { + int i; + /* We assume that the table will be output starting at column 2. */ + int j = 2; + for (i = 0; i < nsyms; i++) + { + const char *cp = quotearg_style (c_quoting_style, symbols[i]->tag); + /* Width of the next token, including the two quotes, the + comma and the space. */ + int width = strlen (cp) + 2; - if (! toknumflag && ! noparserflag) - fprintf (ftable, "#endif\n\n"); + if (j + width > 75) + { + obstack_sgrow (&format_obstack, "\n "); + j = 1; + } - /* Output YYTOKNUM. */ - if (toknumflag) - { - fprintf(ftable, "static const short yytoknum[] = { 0"); - j = 10; - for (i = 1; i <= ntokens; i++) { - putc(',', ftable); - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - j++; - fprintf(ftable, "%6d", user_toknums[i]); + if (i) + obstack_1grow (&format_obstack, ' '); + MUSCLE_OBSTACK_SGROW (&format_obstack, cp); + obstack_1grow (&format_obstack, ','); + j += width; } - fprintf(ftable, "\n};\n\n"); - } - - /* Output YYR1. */ - fputs ("\ -/* YYR1[YYN]: Symbol number of symbol that rule YYN derives. */\n\ -static const short yyr1[] = { 0", ftable); - - j = 10; - for (i = 1; i <= nrules; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", rlhs[i]); - } - FREE(rlhs + 1); - fputs ("\n\ -};\n\ -\n", ftable); - - /* Output YYR2. */ - fputs ("\ -/* YYR2[YYN]: Number of symbols composing right hand side of rule YYN. */\n\ -static const short yyr2[] = { 0", ftable); - j = 10; - for (i = 1; i < nrules; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", rrhs[i + 1] - rrhs[i] - 1); - } - - putc(',', ftable); - if (j >= 10) - putc('\n', ftable); - - fprintf(ftable, "%6d\n};\n", nitems - rrhs[nrules] - 1); - FREE(rrhs + 1); -} + /* Add a NULL entry to list of tokens (well, 0, as NULL might not be + defined). */ + obstack_sgrow (&format_obstack, " 0"); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); + } -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); + /* Output YYTOKNUM. */ + { + int i; + int *values = MALLOC (values, ntokens); + for (i = 0; i < ntokens; ++i) + values[i] = symbols[i]->user_token_number; + muscle_insert_int_table ("toknum", values, + values[0], 1, ntokens); + free (values); + } } +/*-------------------------------------------------------------. +| Prepare the muscles related to the rules: rhs, prhs, r1, r2, | +| rline, dprec, merger. | +`-------------------------------------------------------------*/ -/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable and yycheck. */ - -void -output_actions (void) +static void +prepare_rules (void) { - nvectors = nstates + nvars; - - froms = NEW2(nvectors, short *); - tos = NEW2(nvectors, short *); - tally = NEW2(nvectors, short); - width = NEW2(nvectors, short); - - token_actions(); - free_shifts(); - free_reductions(); - FREE(lookaheads); - FREE(LA); - FREE(LAruleno); - FREE(accessing_symbol); - - goto_actions(); - FREE(goto_map + ntokens); - FREE(from_state); - FREE(to_state); - - sort_actions(); - pack_table(); - output_base(); - output_table(); - output_check(); + rule_number r; + unsigned int i = 0; + item_number *rhs = MALLOC (rhs, nritems); + unsigned int *prhs = MALLOC (prhs, nrules); + unsigned int *rline = MALLOC (rline, nrules); + symbol_number *r1 = MALLOC (r1, nrules); + unsigned int *r2 = MALLOC (r2, nrules); + short *dprec = MALLOC (dprec, nrules); + short *merger = MALLOC (merger, nrules); + + for (r = 0; r < nrules; ++r) + { + item_number *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.start.line; + /* Dynamic precedence (GLR). */ + dprec[r] = rules[r].dprec; + /* Merger-function index (GLR). */ + merger[r] = rules[r].merger; + } + if (i != nritems) + abort (); + + muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems); + muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules); + muscle_insert_unsigned_int_table ("rline", rline, 0, 0, nrules); + muscle_insert_symbol_number_table ("r1", r1, 0, 0, nrules); + muscle_insert_unsigned_int_table ("r2", r2, 0, 0, nrules); + muscle_insert_short_table ("dprec", dprec, 0, 0, nrules); + muscle_insert_short_table ("merger", merger, 0, 0, nrules); + + MUSCLE_INSERT_INT ("rules_number", nrules); + + free (rhs); + free (prhs); + free (rline); + free (r1); + free (r2); + free (dprec); + free (merger); } +/*--------------------------------------------. +| Prepare the muscles related to the states. | +`--------------------------------------------*/ - -/* figure out the actions for the specified state, indexed by lookahead token type. - - The yydefact table is output now. The detailed info - is saved for putting into yytable later. */ - -void -token_actions (void) +static void +prepare_states (void) { - register int i; - register int j; - register int k; - - actrow = NEW2(ntokens, short); - - k = action_row(0); - fprintf(ftable, "\nstatic const short yydefact[] = {%6d", k); - save_row(0); - - j = 10; - for (i = 1; i < nstates; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - k = action_row(i); - fprintf(ftable, "%6d", k); - save_row(i); - } - - fprintf(ftable, "\n};\n"); - FREE(actrow); + state_number i; + symbol_number *values = MALLOC (values, nstates); + for (i = 0; i < nstates; ++i) + values[i] = states[i]->accessing_symbol; + muscle_insert_symbol_number_table ("stos", values, + 0, 1, nstates); + free (values); + + MUSCLE_INSERT_INT ("last", high); + MUSCLE_INSERT_INT ("final_state_number", final_state->number); + MUSCLE_INSERT_INT ("states_number", nstates); } -/* Decide what to do for each type of token if seen as the lookahead token in specified state. - The value returned is used as the default action (yydefact) for the state. - In addition, actrow is filled with what to do for each kind of token, - index by symbol number, with zero meaning do the default action. - The value MINSHORT, a very negative number, means this situation - is an error. The parser recognizes this value specially. +/*---------------------------------. +| Output the user actions to OUT. | +`---------------------------------*/ - 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. */ - -int -action_row (int state) +static void +user_actions_output (FILE *out) { - register int i; - register int j; - register int k; - register int m = 0; - register int n = 0; - register int count; - register int default_rule; - register int nreds; - register int max; - register int rule; - register int shift_state; - register int symbol; - register unsigned mask; - register unsigned *wordp; - register reductions *redp; - register shifts *shiftp; - register errs *errp; - int nodefault = 0; /* set nonzero to inhibit having any default reduction */ - - for (i = 0; i < ntokens; i++) - actrow[i] = 0; - - default_rule = 0; - nreds = 0; - redp = reduction_table[state]; - - if (redp) - { - 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++; - } - } - } - } - } - - 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) - { - 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; + rule_number r; - actrow[symbol] = 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]; - - /* See which tokens are an explicit error in this state - (due to %nonassoc). For them, record MINSHORT as the action. */ - - if (errp) - { - k = errp->nerrs; - - for (i = 0; i < k; i++) - { - 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 (consistent[state]) - default_rule = redp->rules[0]; - else - { - max = 0; - for (i = m; i < n; i++) - { - count = 0; - rule = - LAruleno[i]; - - for (j = 0; j < ntokens; j++) - { - if (actrow[j] == rule) - count++; - } - - if (count > max) - { - max = count; - default_rule = rule; - } - } - - /* actions which match the default are replaced with zero, - which means "use the default" */ - - if (max > 0) - { - for (j = 0; j < ntokens; j++) - { - if (actrow[j] == default_rule) - actrow[j] = 0; - } - - default_rule = - default_rule; - } - } - } - - /* If have no default rule, the default is an error. - So replace any action which says "error" with "use default". */ - - if (default_rule == 0) - for (j = 0; j < ntokens; j++) + fputs ("m4_define([b4_actions], \n[[", out); + for (r = 0; r < nrules; ++r) + if (rules[r].action) { - if (actrow[j] == MINSHORT) - actrow[j] = 0; + fprintf (out, " case %d:\n", r + 1); + + fprintf (out, "]b4_syncline([[%d]], ", + rules[r].action_location.start.line); + escaped_file_name_output (out, rules[r].action_location.start.file); + fprintf (out, ")[\n"); + fprintf (out, " %s\n break;\n\n", + rules[r].action); } - - return (default_rule); + fputs ("]])\n\n", out); } +/*--------------------------------------. +| Output the merge functions to OUT. | +`--------------------------------------*/ -void -save_row (int state) +static void +merger_output (FILE *out) { - register int i; - register int count; - register short *sp; - register short *sp1; - register short *sp2; - - count = 0; - for (i = 0; i < ntokens; i++) - { - if (actrow[i] != 0) - count++; - } - - if (count == 0) - return; - - froms[state] = sp1 = sp = NEW2(count, short); - tos[state] = sp2 = NEW2(count, short); + int n; + merger_list* p; - for (i = 0; i < ntokens; i++) + fputs ("m4_define([b4_mergers], \n[[", out); + for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next) { - if (actrow[i] != 0) - { - *sp1++ = i; - *sp2++ = actrow[i]; - } - } - - tally[state] = count; - width[state] = sp1[-1] - sp[0] + 1; -} - - - -/* figure out what to do after reducing with each rule, - depending on the saved state from before the beginning - of parsing the data that matched this rule. - - The yydefgoto table is output now. The detailed info - is saved for putting into yytable later. */ - -void -goto_actions (void) -{ - register int i; - register int j; - register int k; - - state_count = NEW2(nstates, short); - - 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++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } + if (p->type[0] == '\0') + fprintf (out, " case %d: yyval = %s (*yy0, *yy1); break;\n", + n, p->name); else - { - j++; - } - - k = default_goto(i); - fprintf(ftable, "%6d", k); - save_column(i, k); + fprintf (out, " case %d: yyval.%s = %s (*yy0, *yy1); break;\n", + n, p->type, p->name); } - - fprintf(ftable, "\n};\n"); - FREE(state_count); + fputs ("]])\n\n", out); } +/*--------------------------------------. +| Output the tokens definition to OUT. | +`--------------------------------------*/ - -int -default_goto (int symbol) +static void +token_definitions_output (FILE *out) { - register int i; - register int m; - register int n; - register int default_state; - register int max; - - m = goto_map[symbol]; - n = goto_map[symbol + 1]; - - if (m == n) - return (-1); - - for (i = 0; i < nstates; i++) - state_count[i] = 0; + int i; + int first = 1; - 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; - } - } - - return (default_state); -} - - -void -save_column (int symbol, int default_state) -{ - register int i; - register int m; - register int n; - register short *sp; - register short *sp1; - register short *sp2; - register int count; - register int symno; - - m = goto_map[symbol]; - n = goto_map[symbol + 1]; - - count = 0; - for (i = m; i < n; i++) - { - if (to_state[i] != default_state) - count++; - } - - if (count == 0) - return; - - symno = symbol - ntokens + nstates; - - froms[symno] = sp1 = sp = NEW2(count, short); - tos[symno] = sp2 = NEW2(count, short); - - for (i = m; i < n; 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; -} - - - -/* The next few functions decide how to pack the actions and gotos - information into yytable. */ - -void -sort_actions (void) -{ - register int i; - register int j; - register int k; - register int t; - register int w; - - order = NEW2(nvectors, short); - nentries = 0; - - for (i = 0; i < nvectors; i++) + fputs ("m4_define([b4_tokens], \n[", out); + for (i = 0; i < ntokens; ++i) { - if (tally[i] > 0) - { - t = tally[i]; - w = width[i]; - j = nentries - 1; + symbol *sym = symbols[i]; + int number = sym->user_token_number; - while (j >= 0 && (width[order[j]] < w)) - j--; + /* At this stage, if there are literal aliases, they are part of + SYMBOLS, so we should not find symbols which are the aliases + here. */ + if (number == USER_NUMBER_ALIAS) + abort (); - while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t)) - j--; + /* Skip error token. */ + if (sym == errtoken) + continue; - for (k = nentries - 1; k > j; k--) - order[k + 1] = order[k]; + /* If this string has an alias, then it is necessarily the alias + which is to be output. */ + if (sym->alias) + sym = sym->alias; - order[j + 1] = i; - nentries++; - } - } -} + /* 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 (sym->tag[0] == '\'' || sym->tag[0] == '\"') + continue; + /* Don't #define nonliteral tokens whose names contain periods + or '$' (as does the default value of the EOF token). */ + if (strchr (sym->tag, '.') || strchr (sym->tag, '$')) + continue; -void -pack_table (void) -{ - register int i; - register int place; - register int state; - - base = NEW2(nvectors, short); - pos = NEW2(nentries, short); - table = NEW2(MAXTABLE, short); - check = NEW2(MAXTABLE, short); - - lowzero = 0; - high = 0; - - for (i = 0; i < nvectors; i++) - base[i] = MINSHORT; - - for (i = 0; i < MAXTABLE; i++) - check[i] = -1; - - for (i = 0; i < nentries; i++) - { - state = matching_state(i); - - if (state < 0) - place = pack_vector(i); - else - place = base[state]; - - pos[i] = place; - base[order[i]] = place; - } + fprintf (out, "%s[[[%s]], [%d]]", + first ? "" : ",\n", sym->tag, number); - for (i = 0; i < nvectors; i++) - { - if (froms[i]) - FREE(froms[i]); - if (tos[i]) - FREE(tos[i]); + first = 0; } - - FREE(froms); - FREE(tos); - FREE(pos); + fputs ("])\n\n", out); } +/*---------------------------------------. +| Output the symbol destructors to OUT. | +`---------------------------------------*/ -int -matching_state (int vector) +static void +symbol_destructors_output (FILE *out) { - register int i; - register int j; - register int k; - register int t; - register int w; - register int match; - register int prev; - - i = order[vector]; - if (i >= nstates) - return (-1); - - t = tally[i]; - w = width[i]; - - for (prev = vector - 1; prev >= 0; prev--) - { - j = order[prev]; - 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 (match) - return (j); - } + int i; + int first = 1; - return (-1); + fputs ("m4_define([b4_symbol_destructors], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->destructor) + { + symbol *sym = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + destructor, typename. */ + fprintf (out, "%s[", + first ? "" : ",\n"); + escaped_file_name_output (out, sym->destructor_location.start.file); + fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + sym->destructor_location.start.line, + sym->tag, + sym->number, + sym->destructor, + sym->type_name); + + first = 0; + } + fputs ("])\n\n", out); } +/*------------------------------------. +| Output the symbol printers to OUT. | +`------------------------------------*/ -int -pack_vector (int vector) +static void +symbol_printers_output (FILE *out) { - register int i; - register int j; - register int k; - register int t; - register int loc = 0; - register int ok; - register short *from; - register short *to; - - i = order[vector]; - t = tally[i]; - - if (t == 0) - berror("pack_vector"); - - from = froms[i]; - to = tos[i]; - - for (j = lowzero - from[0]; j < MAXTABLE; j++) - { - ok = 1; - - for (k = 0; ok && k < t; k++) - { - loc = j + from[k]; - if (loc > MAXTABLE) - fatal (_("maximum table size (%d) exceeded"), MAXTABLE); - - if (table[loc] != 0) - ok = 0; - } - - for (k = 0; ok && k < vector; k++) - { - 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]; - } - - while (table[lowzero] != 0) - lowzero++; - - if (loc > high) - high = loc; - - return (j); - } - } + int i; + int first = 1; - berror("pack_vector"); - return 0; /* JF keep lint happy */ + fputs ("m4_define([b4_symbol_printers], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->printer) + { + symbol *sym = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + printer, typename. */ + fprintf (out, "%s[", + first ? "" : ",\n"); + escaped_file_name_output (out, sym->printer_location.start.file); + fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + sym->printer_location.start.line, + sym->tag, + sym->number, + sym->printer, + sym->type_name); + + first = 0; + } + fputs ("])\n\n", out); } - -/* the following functions output yytable, yycheck - and the vectors whose elements index the portion starts */ - -void -output_base (void) +static void +prepare_actions (void) { - register int i; - register int j; - - fprintf(ftable, "\nstatic const short yypact[] = {%6d", base[0]); - - j = 10; - for (i = 1; i < nstates; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", base[i]); - } - - fprintf(ftable, "\n};\n\nstatic const short yypgoto[] = {%6d", base[nstates]); - - j = 10; - for (i = nstates + 1; i < nvectors; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", base[i]); - } - - fprintf(ftable, "\n};\n"); - FREE(base); + /* Figure out the actions for the specified state, indexed by + lookahead token type. */ + + muscle_insert_rule_number_table ("defact", yydefact, + yydefact[0], 1, nstates); + + /* Figure out what to do after reducing with each rule, depending on + the saved state from before the beginning of parsing the data + that matched this rule. */ + muscle_insert_state_number_table ("defgoto", yydefgoto, + yydefgoto[0], 1, nsyms - ntokens); + + + /* Output PACT. */ + muscle_insert_base_table ("pact", base, + base[0], 1, nstates); + MUSCLE_INSERT_INT ("pact_ninf", base_ninf); + + /* Output PGOTO. */ + muscle_insert_base_table ("pgoto", base, + base[nstates], nstates + 1, nvectors); + + muscle_insert_base_table ("table", table, + table[0], 1, high + 1); + MUSCLE_INSERT_INT ("table_ninf", table_ninf); + + muscle_insert_base_table ("check", check, + check[0], 1, high + 1); + + /* 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 could avoid accidents by not writing them out in + that case. Nevertheless, it seems even better to be able to use + the GLR skeletons even without the non-deterministic tables. */ + 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); } + +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ -void -output_table (void) +static void +output_skeleton (void) { - register int i; - register int j; - - fprintf(ftable, "\n\n#define\tYYLAST\t\t%d\n\n", high); - fprintf(ftable, "\nstatic const short yytable[] = {%6d", table[0]); - - j = 10; - for (i = 1; i <= high; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } - else - { - j++; - } - - fprintf(ftable, "%6d", table[i]); - } - - fprintf(ftable, "\n};\n"); - FREE(table); + FILE *in; + FILE *out; + int filter_fd[2]; + char const *argv[6]; + pid_t pid; + + /* Compute the names of the package data dir and skeleton file. + Test whether m4sugar.m4 is readable, to check for proper + installation. A faulty installation can cause deadlock, so a + cheap sanity check is worthwhile. */ + char const m4sugar[] = "m4sugar/m4sugar.m4"; + char *full_m4sugar; + char *full_cm4; + char *full_path; + char const *p; + char const *m4 = (p = getenv ("M4")) ? p : M4; + char const *pkgdatadir = (p = getenv ("BISON_PKGDATADIR")) ? p : PKGDATADIR; + size_t skeleton_size = strlen (skeleton) + 1; + size_t pkgdatadirlen = strlen (pkgdatadir); + while (pkgdatadirlen && pkgdatadir[pkgdatadirlen - 1] == '/') + pkgdatadirlen--; + full_path = xmalloc (pkgdatadirlen + 1 + + (skeleton_size < sizeof m4sugar + ? sizeof m4sugar : skeleton_size)); + strcpy (full_path, pkgdatadir); + full_path[pkgdatadirlen] = '/'; + strcpy (full_path + pkgdatadirlen + 1, m4sugar); + full_m4sugar = xstrdup (full_path); + strcpy (full_path + pkgdatadirlen + 1, "c.m4"); + full_cm4 = xstrdup (full_path); + strcpy (full_path + pkgdatadirlen + 1, skeleton); + xfclose (xfopen (full_m4sugar, "r")); + + /* Create an m4 subprocess connected to us via two pipes. */ + + if (trace_flag & trace_tools) + fprintf (stderr, "running: %s %s - %s %s\n", + m4, full_m4sugar, full_cm4, full_path); + + argv[0] = m4; + argv[1] = full_m4sugar; + argv[2] = "-"; + argv[3] = full_cm4; + argv[4] = full_path; + argv[5] = NULL; + + init_subpipe (); + pid = create_subpipe (argv, filter_fd); + free (full_m4sugar); + free (full_cm4); + free (full_path); + + out = fdopen (filter_fd[0], "w"); + if (! out) + error (EXIT_FAILURE, get_errno (), "fdopen"); + + /* Output the definitions of all the muscles. */ + fputs ("m4_init()\n", out); + + user_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); + + /* Read and process m4's output. */ + timevar_push (TV_M4); + in = fdopen (filter_fd[1], "r"); + if (! in) + error (EXIT_FAILURE, get_errno (), "fdopen"); + scan_skel (in); + xfclose (in); + reap_subpipe (pid, m4); + timevar_pop (TV_M4); } - -void -output_check (void) +static void +prepare (void) { - register int i; - register int j; - - fprintf(ftable, "\nstatic const short yycheck[] = {%6d", check[0]); - - j = 10; - for (i = 1; i <= high; i++) - { - putc(',', ftable); - - if (j >= 10) - { - putc('\n', ftable); - j = 1; - } + /* Flags. */ + MUSCLE_INSERT_INT ("debug", debug_flag); + MUSCLE_INSERT_INT ("defines_flag", defines_flag); + MUSCLE_INSERT_INT ("error_verbose", error_verbose); + MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("pure", pure_parser); + MUSCLE_INSERT_INT ("synclines_flag", !no_lines_flag); + + /* File names. */ + MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); + + /* User Code. */ + 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) + { + if (glr_parser || nondeterministic_parser) + skeleton = "glr.c"; else - { - j++; - } - - fprintf(ftable, "%6d", check[i]); + skeleton = "yacc.c"; } - fprintf(ftable, "\n};\n"); - FREE(check); -} - - - -/* copy the parser code into the ftable file at the end. */ - -void -output_parser (void) -{ - register int c; -#ifdef DONTDEF - FILE *fpars; -#else -#define fpars fparser -#endif - - if (pure_parser) - fprintf(ftable, "#define YYPURE 1\n\n"); - -#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 - - /* Loop over lines in the standard parser file. */ - - while (1) - { - int write_line = 1; - - c = getc(fpars); - - /* See if the line starts with `#line. - If so, set write_line to 0. */ - if (nolinesflag) - 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 == '$') - { - /* `$' 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); - } - else - putc(c, ftable); - } - if (c == EOF) - break; - putc(c, ftable); - } -} - -void -output_program (void) -{ - register int c; - - if (!nolinesflag) - fprintf(ftable, "#line %d \"%s\"\n", lineno, infile); - - c = getc(finput); - while (c != EOF) - { - putc(c, ftable); - c = getc(finput); - } + /* Parse the skeleton file and output the needed parsers. */ + MUSCLE_INSERT_C_STRING ("skeleton", skeleton); } -void -free_itemsets (void) -{ - register core *cp,*cptmp; - - FREE(state_table); - - for (cp = first_state; cp; cp = cptmp) { - cptmp=cp->next; - FREE(cp); - } -} - +/*----------------------------------------------------------. +| Output the parsing tables and the parser code to ftable. | +`----------------------------------------------------------*/ void -free_shifts (void) +output (void) { - register shifts *sp,*sptmp;/* JF derefrenced freed ptr */ - - FREE(shift_table); - - for (sp = first_shift; sp; sp = sptmp) { - sptmp=sp->next; - FREE(sp); - } -} + obstack_init (&format_obstack); + prepare_symbols (); + prepare_rules (); + prepare_states (); + prepare_actions (); -void -free_reductions (void) -{ - register reductions *rp,*rptmp;/* JF fixed freed ptr */ + prepare (); - FREE(reduction_table); + /* Process the selected skeleton file. */ + output_skeleton (); - for (rp = first_reduction; rp; rp = rptmp) { - rptmp=rp->next; - FREE(rp); - } + obstack_free (&format_obstack, NULL); + obstack_free (&pre_prologue_obstack, NULL); + obstack_free (&post_prologue_obstack, NULL); }