X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f0440388e9b85171b4f6ea3ecf95dc82799fffc1..fc5734fe23f35e5ce15f6b9c550115fb69113ea2:/src/output.c diff --git a/src/output.c b/src/output.c index 4de58e9e..c218af3e 100644 --- a/src/output.c +++ b/src/output.c @@ -1,5 +1,6 @@ /* Output the generated parsing program for bison, - Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc. + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -20,78 +21,74 @@ /* 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. + YYTRANSLATE = vector mapping yylex's token numbers into bison's + token numbers. - ** yytname = vector of string-names indexed by bison token number + YYTNAME = vector of string-names indexed by bison token number. - ** yytoknum = vector of yylex token numbers corresponding to entries - in yytname + YYTOKNUM = vector of yylex token numbers corresponding to entries + in YYTNAME. - yyrline = vector of line-numbers of all rules. For yydebug printouts. + YYRLINE = vector of line-numbers of all rules. For yydebug + printouts. - yyrhs = vector of items of all rules. - This is exactly what ritems contains. For yydebug and for semantic - parser. + YYRHS = vector of items of all rules. This is exactly what RITEMS + contains. For yydebug and for semantic parser. - yyprhs[r] = index in yyrhs of first item for rule r. + YYPRHS[R] = index in YYRHS of first item for rule R. - yyr1[r] = symbol number of symbol that rule r derives. + YYR1[R] = symbol number of symbol that rule R derives. - yyr2[r] = number of symbols composing right hand side of rule r. + YYR2[R] = number of symbols composing right hand side of rule R. - * yystos[s] = the symbol number of the symbol that leads to state s. + YYSTOS[S] = the symbol number of the symbol that leads to state S. - yydefact[s] = default rule to reduce with in state s, - when yytable doesn't specify something else to do. - Zero means the default is an error. + YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE + doesn't specify something else to do. Zero means the default is an + error. - yydefgoto[i] = default state to go to after a reduction of a rule that - generates variable ntokens + i, except when yytable - specifies something else to do. + YYDEFGOTO[I] = default state to go to after a reduction of a rule + that generates variable NTOKENS + I, except when YYTABLE specifies + something else to do. - yypact[s] = index in yytable of the portion describing state s. - The lookahead token's type is used to index that portion - to find out what to do. + YYPACT[S] = index in YYTABLE of the portion describing state S. + The lookahead token's type is used to index that portion to find + out what to do. - If the value in yytable is positive, - we shift the token and go to that state. + If the value in YYTABLE is positive, we shift the token and go to + that state. If the value is negative, it is minus a rule number to reduce by. - If the value is zero, the default action from yydefact[s] is used. + If the value is zero, the default action from YYDEFACT[S] is used. - yypgoto[i] = the index in yytable of the portion describing - what to do after reducing a rule that derives variable i + ntokens. - This portion is indexed by the parser state number, s, - as of before the text for this nonterminal was read. - The value from yytable is the state to go to if - the corresponding value in yycheck is s. + YYPGOTO[I] = the index in YYTABLE of the portion describing what to + do after reducing a rule that derives variable I + NTOKENS. This + portion is indexed by the parser state number, S, as of before the + text for this nonterminal was read. The value from YYTABLE is the + state to go to if the corresponding value in YYCHECK is S. - yytable = a vector filled with portions for different uses, - found via yypact and yypgoto. + YYTABLE = a vector filled with portions for different uses, found + via YYPACT and YYPGOTO. - yycheck = a vector indexed in parallel with yytable. - It indicates, in a roundabout way, the bounds of the - portion you are trying to examine. + YYCHECK = a vector indexed in parallel with YYTABLE. It indicates, + in a roundabout way, the bounds of the portion you are trying to + examine. - Suppose that the portion of yytable starts at index p - and the index to be examined within the portion is i. - Then if yycheck[p+i] != i, i is outside the bounds - of what is actually allocated, and the default - (from yydefact or yydefgoto) should be used. - Otherwise, yytable[p+i] should be used. + Suppose that the portion of YYTABLE starts at index P and the index + to be examined within the portion is I. Then if YYCHECK[P+I] != I, + I is outside the bounds of what is actually allocated, and the + default (from YYDEFACT or YYDEFGOTO) should be used. Otherwise, + YYTABLE[P+I] should be used. - YYFINAL = the state number of the termination state. - YYFLAG = most negative short int. Used to flag ?? - YYNTBASE = ntokens. -*/ + YYFINAL = the state number of the termination state. YYFLAG = most + negative short int. Used to flag ?? */ #include "system.h" +#include "bitsetv.h" #include "quotearg.h" +#include "error.h" #include "getargs.h" #include "files.h" #include "gram.h" @@ -100,333 +97,483 @@ #include "output.h" #include "lalr.h" #include "reader.h" +#include "symtab.h" #include "conflicts.h" #include "muscle_tab.h" +/* From src/scan-skel.l. */ +void m4_invoke PARAMS ((const char *definitions)); + + +/* Several tables will be indexed both by state and nonterminal + numbers. We call `vector' such a thing (= either a state or a + symbol number. + + Of course vector_number_t ought to be wide enough to contain + state_number_t and symbol_number_t. */ +typedef short vector_number_t; +#define VECTOR_NUMBER_MAX ((vector_number_t) SHRT_MAX) +#define VECTOR_NUMBER_MIN ((vector_number_t) SHRT_MIN) +#define state_number_to_vector_number(State) \ + ((vector_number_t) State) +#define symbol_number_to_vector_number(Symbol) \ + ((vector_number_t) (state_number_as_int (nstates) + Symbol - ntokens)) static int nvectors; -static int nentries; -static short **froms = NULL; -static short **tos = NULL; + + +/* FROMS and TOS are indexed by vector_number_t. + + If VECTOR is a nonterminal, (FROMS[VECTOR], TOS[VECTOR]) form an + array of state numbers of the non defaulted GOTO on VECTOR. + + If VECTOR is a state, TOS[VECTOR] is the array of actions to do on + the (array of) symbols FROMS[VECTOR]. + + In both cases, TALLY[VECTOR] is the size of the arrays + FROMS[VECTOR], TOS[VECTOR]; and WIDTH[VECTOR] = + (FROMS[VECTOR][SIZE] - FROMS[VECTOR][0] + 1) where SIZE = + TALLY[VECTOR]. + + FROMS therefore contains symbol_number_t and action_number_t, + TOS state_number_t and action_number_t, + TALLY sizes, + WIDTH differences of FROMS. + + Let base_t be the type of FROMS, TOS, and WIDTH. */ +typedef int base_t; +#define BASE_MAX ((base_t) INT_MAX) +#define BASE_MIN ((base_t) INT_MIN) + +static base_t **froms = NULL; +static base_t **tos = NULL; +static unsigned int **conflict_tos = NULL; static short *tally = NULL; -static short *width = NULL; -static short *actrow = NULL; -static short *state_count = NULL; -static short *order = NULL; -static short *base = NULL; -static short *pos = NULL; -static short *table = NULL; -static short *check = NULL; +static base_t *width = NULL; + + +/* For a given state, N = ACTROW[SYMBOL]: + + If N = 0, stands for `run the default action'. + If N = MIN, stands for `raise a parse error'. + If N > 0, stands for `shift SYMBOL and go to n'. + If N < 0, stands for `reduce -N'. */ +typedef short action_t; +#define ACTION_MAX ((action_t) SHRT_MAX) +#define ACTION_MIN ((action_t) SHRT_MIN) + +static action_t *actrow = NULL; + +/* FROMS and TOS are reordered to be compressed. ORDER[VECTOR] is the + new vector number of VECTOR. We skip `empty' vectors (i.e., + TALLY[VECTOR] = 0), and call these `entries'. */ +static vector_number_t *order = NULL; +static int nentries; + +static base_t *base = NULL; +/* A distinguished value of BASE, negative infinite. During the + computation equals to BASE_MIN, later mapped to BASE_NINF to + keep parser tables small. */ +base_t base_ninf = 0; +static base_t *pos = NULL; + +static unsigned int *conflrow = 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 base_t *table = NULL; +static base_t *check = NULL; +/* The value used in TABLE to denote explicit parse errors + (%nonassoc), a negative infinite. First defaults to ACTION_MIN, + but in order to keep small tables, renumbered as TABLE_ERROR, which + is the smallest (non error) value minus 1. */ +base_t table_ninf = 0; static int lowzero; static int high; -struct obstack muscle_obstack; -struct obstack output_obstack; +static struct obstack format_obstack; int error_verbose = 0; -/* Returns the number of lines of S. */ -static size_t -get_lines_number (const char *s) + +/*----------------------------------------------------------------. +| 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 void +table_grow (size_t desired) { - size_t lines = 0; - - size_t i; - for (i = 0; s[i]; ++i) - { - if (s[i] == '\n') - ++lines; - } - - return lines; -} + size_t old_size = table_size; + while (table_size <= desired) + table_size *= 2; -/* FIXME. */ + if (trace_flag) + fprintf (stderr, "growing table and check from: %d to %d\n", + old_size, table_size); -static inline void -output_table_data (struct obstack *oout, - short *table_data, - short first, - short begin, - short end) -{ - int i; - int j = 1; + table = XREALLOC (table, base_t, table_size); + check = XREALLOC (check, base_t, table_size); + if (glr_parser) + conflict_table = XREALLOC (conflict_table, unsigned int, table_size); - obstack_fgrow1 (oout, "%6d", first); - for (i = begin; i < end; ++i) + for (/* Nothing. */; old_size < table_size; ++old_size) { - obstack_1grow (oout, ','); - if (j >= 10) - { - obstack_sgrow (oout, "\n "); - j = 1; - } - else - ++j; - obstack_fgrow1 (oout, "%6d", table_data[i]); + table[old_size] = 0; + check[old_size] = -1; } - obstack_1grow (oout, 0); } -static void -output_token_translations (void) -{ - output_table_data (&output_obstack, token_translations, - 0, 1, max_user_token_number + 1); - muscle_insert ("translate", obstack_finish (&output_obstack)); - XFREE (token_translations); +/*-------------------------------------------------------------------. +| Create a function NAME which 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; \ + 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)); \ + \ + /* 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), \ + (long int) min); \ + 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_int_table, int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_base_table, base_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number_t) +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) + + +/*-----------------------------------------------------------------. +| Prepare the muscles related to the tokens: translate, tname, and | +| toknum. | +`-----------------------------------------------------------------*/ static void -output_gram (void) +prepare_tokens (void) { + muscle_insert_symbol_number_table ("translate", + token_translations, + token_translations[0], + 1, max_user_token_number + 1); + { int i; - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rule_table[i].rhs; - output_table_data (&output_obstack, values, - 0, 1, nrules + 1); - XFREE (values); - } + int j = 0; + for (i = 0; i < nsyms; i++) + { + /* Be sure not to use twice the same QUOTEARG slot: + 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; + } + + obstack_sgrow (&format_obstack, cp); + obstack_sgrow (&format_obstack, ", "); + j += strsize; + } + /* Add a NULL entry to list of tokens (well, 0, as NULL might not be + defined). */ + obstack_sgrow (&format_obstack, "0"); - muscle_insert ("prhs", obstack_finish (&output_obstack)); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); + } + /* Output YYTOKNUM. */ { - size_t yyrhs_size = 1; - short *yyrhs, *sp; int i; - - for (sp = ritem + 1; *sp; sp++) - ++yyrhs_size; - yyrhs = XMALLOC (short, yyrhs_size); - - for (sp = ritem + 1, i = 1; *sp; ++sp, ++i) - yyrhs[i] = *sp > 0 ? *sp : 0; - - output_table_data (&output_obstack, yyrhs, - ritem[0], 1, yyrhs_size); - muscle_insert ("rhs", obstack_finish (&output_obstack)); - - XFREE (yyrhs); + int *values = XCALLOC (int, 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); } - -#if 0 - if (!semantic_parser) - obstack_sgrow (&table_obstack, "\n#endif\n"); -#endif } +/*-------------------------------------------------------------. +| Prepare the muscles related to the rules: rhs, prhs, r1, r2, | +| rline, dprec, merger | +`-------------------------------------------------------------*/ + static void -output_stos (void) +prepare_rules (void) { - int i; - short *values = (short *) alloca (sizeof (short) * nstates); - for (i = 0; i < nstates; ++i) - values[i] = state_table[i]->accessing_symbol; - output_table_data (&output_obstack, values, - 0, 1, nstates); - muscle_insert ("stos", obstack_finish (&output_obstack)); + rule_number_t r; + unsigned int i = 0; + item_number_t *rhs = XMALLOC (item_number_t, nritems); + unsigned int *prhs = XMALLOC (unsigned int, nrules); + unsigned int *rline = XMALLOC (unsigned int, nrules); + symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules); + unsigned int *r2 = XMALLOC (unsigned int, nrules); + short *dprec = XMALLOC (short, nrules); + short *merger = XMALLOC (short, nrules); + + for (r = 0; r < nrules; ++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, 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); + + 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; - - { - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rule_table[i].line; - output_table_data (&output_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("rline", obstack_finish (&output_obstack)); - XFREE (values); - } - + 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); +} - j = 0; - for (i = 0; i < nsyms; i++) - { - /* Be sure not to use twice the same quotearg slot. */ - const char *cp = - quotearg_n_style (1, c_quoting_style, - quotearg_style (escape_quoting_style, tags[i])); - /* Width of the next token, including the two quotes, the coma - and the space. */ - int strsize = strlen (cp) + 2; - - if (j + strsize > 75) - { - obstack_sgrow (&output_obstack, "\n "); - j = 2; - } - obstack_sgrow (&output_obstack, cp); - obstack_sgrow (&output_obstack, ", "); - j += strsize; - } - /* add a NULL entry to list of tokens */ - obstack_sgrow (&output_obstack, "NULL"); +/*-------------------------------------------------------------------. +| 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. | +`-------------------------------------------------------------------*/ - /* Finish table and store. */ - obstack_1grow (&output_obstack, 0); - muscle_insert ("tname", obstack_finish (&output_obstack)); +static void +conflict_row (state_t *state) +{ + int i, j; - /* Output YYTOKNUM. */ - output_table_data (&output_obstack, user_toknums, - 0, 1, ntokens + 1); - muscle_insert ("toknum", obstack_finish (&output_obstack)); + if (! glr_parser) + return; - /* Output YYR1. */ - { - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rule_table[i].lhs; - output_table_data (&output_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("r1", obstack_finish (&output_obstack)); - XFREE (values); - } + 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] + != rule_number_as_item_number (state->lookaheads_rule[i]->number))) + { + assert (conflict_list_free > 0); + conflict_list[conflict_list_cnt] + = state->lookaheads_rule[i]->number + 1; + conflict_list_cnt += 1; + conflict_list_free -= 1; + } - /* Output YYR2. */ - short_tab = XMALLOC (short, nrules + 1); - for (i = 1; i < nrules; i++) - short_tab[i] = rule_table[i + 1].rhs - rule_table[i].rhs - 1; - short_tab[nrules] = nitems - rule_table[nrules].rhs - 1; - output_table_data (&output_obstack, short_tab, - 0, 1, nrules + 1); - muscle_insert ("r2", obstack_finish (&output_obstack)); - XFREE (short_tab); + /* Leave a 0 at the end. */ + assert (conflict_list_free > 0); + conflict_list_cnt += 1; + conflict_list_free -= 1; + } } + /*------------------------------------------------------------------. | 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 | +| 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 | +| ACTION_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) +static rule_number_t +action_row (state_t *state) { int i; - int j; - int k; - int m = 0; - int n = 0; - int default_rule; - int nreds; - int rule; - int shift_state; - int symbol; - reductions *redp; - shifts *shiftp; - errs *errp; - int nodefault = 0; /* set nonzero to inhibit having any default reduction */ + rule_number_t default_rule = -1; + 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; + actrow[i] = conflrow[i] = 0; - default_rule = 0; - nreds = 0; - redp = state_table[state]->reductions; - - 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 = state_table[state]->lookaheads; - n = state_table[state + 1]->lookaheads; - - for (i = n - 1; i >= m; i--) - /* and find each token which the rule finds acceptable - to come next */ - for (j = 0; j < ntokens; j++) - /* and record this rule as the rule to use if that - token follows. */ - if (BITISSET (LA (i), j)) - actrow[j] = -LAruleno[i]; + /* and record this rule as the rule to use if that + token follows. */ + if (actrow[j] != 0) + conflicted = conflrow[j] = 1; + actrow[j] = rule_number_as_item_number (state->lookaheads_rule[i]->number); } } /* Now see which tokens are allowed for shifts in this state. For them, record the shift as the thing to do. So shift is preferred to reduce. */ - shiftp = state_table[state]->shifts; - for (i = 0; i < shiftp->nshifts; i++) - { - shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; - - symbol = state_table[shift_state]->accessing_symbol; - - if (ISVAR (symbol)) - break; + 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]; - 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; - } + /* 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. */ - errp = state_table[state]->errs; - - if (errp) + %nonassoc). For them, record ACTION_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] = ACTION_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 (state_table[state]->consistent) + if (state->consistent) default_rule = redp->rules[0]; else { int max = 0; - for (i = m; i < n; i++) + for (i = 0; i < state->nlookaheads; i++) { int count = 0; - rule = -LAruleno[i]; + 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_number_as_item_number (rule)) + count++; if (count > max) { @@ -435,18 +582,19 @@ 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] == rule_number_as_item_number (default_rule) + && ! (glr_parser && conflrow[j])) + actrow[j] = 0; } } } @@ -454,47 +602,58 @@ action_row (int state) /* 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++) - { - if (actrow[j] == MINSHORT) - actrow[j] = 0; - } + if (default_rule == -1) + for (i = 0; i < ntokens; i++) + if (actrow[i] == ACTION_MIN) + actrow[i] = 0; + + if (conflicted) + conflict_row (state); return default_rule; } +/*--------------------------------------------. +| Set FROMS, TOS, TALLY and WIDTH for STATE. | +`--------------------------------------------*/ + 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; + base_t *sp = NULL; + base_t *sp1 = NULL; + base_t *sp2 = NULL; + unsigned int *sp3 = NULL; + /* Number of non default actions in STATE. */ 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); + /* Allocate non defaulted actions. */ + froms[state] = sp1 = sp = XCALLOC (base_t, count); + tos[state] = sp2 = XCALLOC (base_t, count); + if (glr_parser) + conflict_tos[state] = sp3 = XCALLOC (unsigned int, count); + else + conflict_tos[state] = NULL; + /* Store non defaulted actions. */ 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; @@ -512,21 +671,33 @@ save_row (int state) static void token_actions (void) { - int i; - short *yydefact = XCALLOC (short, nstates); + state_number_t i; + int nconflict = conflicts_total_count (); + + rule_number_t *yydefact = XCALLOC (rule_number_t, nstates); + + actrow = XCALLOC (action_t, ntokens); + conflrow = XCALLOC (unsigned int, 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; - actrow = XCALLOC (short, ntokens); for (i = 0; i < nstates; ++i) { - yydefact[i] = action_row (i); + yydefact[i] = action_row (states[i]) + 1; save_row (i); } - output_table_data (&output_obstack, yydefact, - yydefact[0], 1, nstates); - muscle_insert ("defact", obstack_finish (&output_obstack)); - + muscle_insert_rule_number_table ("defact", yydefact, + yydefact[0], 1, nstates); XFREE (actrow); + XFREE (conflrow); XFREE (yydefact); } @@ -535,108 +706,244 @@ token_actions (void) | Output the actions to OOUT. | `-----------------------------*/ -static void -actions_output (FILE *out, size_t *line) +void +actions_output (FILE *out) { - int rule; - for (rule = 1; rule < nrules + 1; ++rule) - if (rule_table[rule].action) + rule_number_t r; + + fputs ("m4_define([b4_actions], \n[[", out); + for (r = 0; r < nrules; ++r) + if (rules[r].action) { - fprintf (out, " case %d:\n", rule); + fprintf (out, " case %d:\n", r + 1); if (!no_lines_flag) fprintf (out, muscle_find ("linef"), - rule_table[rule].action_line, + rules[r].action_location.first_line, quotearg_style (c_quoting_style, muscle_find ("filename"))); - /* As a Bison extension, add the ending semicolon. Since some - Yacc don't do that, help people using bison as a Yacc - finding their missing semicolons. */ - fprintf (out, "{ %s%s }\n break;\n\n", - rule_table[rule].action, - yacc_flag ? ";" : ""); - - /* We always output 5 '\n' per action. */ - *line += 5; - /* Get the number of lines written by the user. */ - *line += get_lines_number (rule_table[rule].action); + fprintf (out, " %s\n break;\n\n", + rules[r].action); + } + fputs ("]])\n\n", out); +} + +/*--------------------------------------. +| 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) + { + 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. | +`---------------------------------------*/ + +void +token_definitions_output (FILE *out) +{ + int i; + int first = 1; + + fputs ("m4_define([b4_tokens], \n[", out); + for (i = 0; i < ntokens; ++i) + { + 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 +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); } +/*------------------------------------------------------------------. +| Compute FROMS[VECTOR], TOS[VECTOR], TALLY[VECTOR], WIDTH[VECTOR], | +| i.e., the information related to non defaulted GOTO on the nterm | +| SYMBOL. | +| | +| DEFAULT_STATE is the principal destination on SYMBOL, i.e., the | +| default GOTO destination on SYMBOL. | +`------------------------------------------------------------------*/ + static void -save_column (int symbol, int default_state) +save_column (symbol_number_t symbol, state_number_t default_state) { int i; - short *sp; - short *sp1; - short *sp2; + base_t *sp; + base_t *sp1; + base_t *sp2; int count; - int symno; + vector_number_t symno = symbol_number_to_vector_number (symbol); - short begin = goto_map[symbol]; - short end = goto_map[symbol + 1]; + goto_number_t begin = goto_map[symbol]; + goto_number_t end = goto_map[symbol + 1]; + /* Number of non default GOTO. */ 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); + /* Allocate room for non defaulted gotos. */ + froms[symno] = sp1 = sp = XCALLOC (base_t, count); + tos[symno] = sp2 = XCALLOC (base_t, count); + /* Store the state numbers of the non defaulted gotos. */ 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) + +/*----------------------------------------------------------------. +| Return `the' most common destination GOTO on SYMBOL (a nterm). | +`----------------------------------------------------------------*/ + +static state_number_t +default_goto (symbol_number_t symbol, short state_count[]) { + state_number_t s; int i; - int m; - int n; - int default_state; - int max; - - m = goto_map[symbol]; - n = goto_map[symbol + 1]; + goto_number_t m = goto_map[symbol]; + goto_number_t 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; } @@ -654,78 +961,77 @@ default_goto (int symbol) static void goto_actions (void) { - int i; - short *yydefgoto = XMALLOC (short, nsyms - ntokens); + symbol_number_t i; + state_number_t *yydefgoto = XMALLOC (state_number_t, nvars); - state_count = XCALLOC (short, nstates); + /* For a given nterm I, STATE_COUNT[S] is the number of times there + is a GOTO to S on I. */ + short *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, state_count); save_column (i, default_state); yydefgoto[i - ntokens] = default_state; } - output_table_data (&output_obstack, yydefgoto, - yydefgoto[0], 1, nsyms - ntokens); - muscle_insert ("defgoto", obstack_finish (&output_obstack)); - + muscle_insert_state_number_table ("defgoto", yydefgoto, + yydefgoto[0], 1, nsyms - ntokens); XFREE (state_count); XFREE (yydefgoto); } -/* The next few functions decide how to pack the actions and gotos - information into yytable. */ +/*------------------------------------------------------------------. +| Compute ORDER, a reordering of vectors, in order to decide how to | +| pack the actions and gotos information into yytable. | +`------------------------------------------------------------------*/ 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) +/* If VECTOR is a state which actions (reflected by FROMS, TOS, TALLY + and WIDTH of VECTOR) are common to a previous state, return this + state number. + + In any other case, return -1. */ + +static state_number_t +matching_state (vector_number_t vector) { - int i; - int j; - int k; + vector_number_t i = order[vector]; int t; int w; - int match; int prev; - i = order[vector]; - if (i >= nstates) + /* If VECTOR is a nterm, return -1. */ + if (i >= (int) nstates) return -1; t = tally[i]; @@ -733,16 +1039,18 @@ matching_state (int vector) for (prev = vector - 1; prev >= 0; prev--) { - j = order[prev]; + vector_number_t j = order[prev]; + int k; + int match = 1; + + /* Given how ORDER was computed, if the WIDTH or TALLY is + different, there cannot be a matching state. */ 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; @@ -752,45 +1060,37 @@ matching_state (int vector) } -static int -pack_vector (int vector) +static base_t +pack_vector (vector_number_t vector) { - int i; + vector_number_t 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]; + base_t *from = froms[i]; + base_t *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) { @@ -798,6 +1098,8 @@ pack_vector (int vector) { loc = j + from[k]; table[loc] = to[k]; + if (glr_parser && conflict_to != NULL) + conflict_table[loc] = conflict_to[k]; check[loc] = from[k]; } @@ -807,78 +1109,113 @@ pack_vector (int vector) if (loc > high) high = loc; + if (j < BASE_MIN || BASE_MAX < j) + fatal ("base_t too small to hold %d\n", j); return j; } } - - assert (!"pack_vector"); +#define pack_vector_succeeded 0 + assert (pack_vector_succeeded); return 0; } +/*-------------------------------------------------------------. +| Remap the negative infinite in TAB from NINF to the greatest | +| possible smallest value. Return it. | +| | +| In most case this allows us to use shorts instead of ints in | +| parsers. | +`-------------------------------------------------------------*/ + +static base_t +table_ninf_remap (base_t tab[], size_t size, base_t ninf) +{ + base_t res = 0; + size_t i; + + for (i = 0; i < size; i++) + if (tab[i] < res && tab[i] != ninf) + res = base[i]; + + --res; + + for (i = 0; i < size; i++) + if (tab[i] == ninf) + tab[i] = res; + + return res; +} + static void pack_table (void) { int i; - int place; - int state; - base = XCALLOC (short, nvectors); - pos = XCALLOC (short, nentries); - table = XCALLOC (short, MAXTABLE); - check = XCALLOC (short, MAXTABLE); + base = XCALLOC (base_t, nvectors); + pos = XCALLOC (base_t, nentries); + table = XCALLOC (base_t, table_size); + if (glr_parser) + conflict_table = XCALLOC (unsigned int, table_size); + check = XCALLOC (base_t, table_size); lowzero = 0; high = 0; for (i = 0; i < nvectors; i++) - base[i] = MINSHORT; + base[i] = BASE_MIN; - for (i = 0; i < MAXTABLE; i++) + for (i = 0; i < (int) table_size; i++) check[i] = -1; for (i = 0; i < nentries; i++) { - state = matching_state (i); + state_number_t state = matching_state (i); + base_t place; if (state < 0) + /* A new set of state actions, or a nonterminal. */ place = pack_vector (i); else + /* Action of I were already coded for STATE. */ place = base[state]; pos[i] = place; base[order[i]] = place; } + /* Use the greatest possible negative infinites. */ + base_ninf = table_ninf_remap (base, nvectors, BASE_MIN); + table_ninf = table_ninf_remap (table, high + 1, ACTION_MIN); + 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 (pos); + free (froms); + free (tos); + free (conflict_tos); + free (pos); } -/* the following functions output yytable, yycheck - and the vectors whose elements index the portion starts */ + +/* the following functions output yytable, yycheck, yyconflp, yyconfl, + and the vectors whose elements index the portion starts. */ static void output_base (void) { - /* Output pact. */ - output_table_data (&output_obstack, base, - base[0], 1, nstates); - muscle_insert ("pact", obstack_finish (&output_obstack)); - - /* Output pgoto. */ - output_table_data (&output_obstack, base, - base[nstates], nstates + 1, nvectors); - muscle_insert ("pgoto", obstack_finish (&output_obstack)); - + /* 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); XFREE (base); } @@ -886,233 +1223,190 @@ output_base (void) static void output_table (void) { - output_table_data (&output_obstack, table, - table[0], 1, high + 1); - muscle_insert ("table", obstack_finish (&output_obstack)); + muscle_insert_base_table ("table", table, + table[0], 1, high + 1); + MUSCLE_INSERT_INT ("table_ninf", table_ninf); 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_table_data (&output_obstack, check, - check[0], 1, high + 1); - muscle_insert ("check", obstack_finish (&output_obstack)); + muscle_insert_base_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) +prepare_actions (void) { - int i; - 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)); - froms = XCALLOC (short *, nvectors); - tos = XCALLOC (short *, nvectors); + nvectors = state_number_as_int (nstates) + nvars; + + froms = XCALLOC (base_t *, nvectors); + tos = XCALLOC (base_t *, nvectors); + conflict_tos = XCALLOC (unsigned int *, nvectors); tally = XCALLOC (short, nvectors); - width = XCALLOC (short, nvectors); + width = XCALLOC (base_t, nvectors); token_actions (); - XFREE (LA); - XFREE (LAruleno); + bitsetv_free (LA); + free (LArule); goto_actions (); XFREE (goto_map + ntokens); XFREE (from_state); XFREE (to_state); + order = XCALLOC (vector_number_t, nvectors); sort_actions (); pack_table (); + free (order); + + free (tally); + free (width); output_base (); output_table (); + output_conflicts (); output_check (); - - for (i = 0; i < nstates; ++i) - { - XFREE (state_table[i]->shifts); - XFREE (state_table[i]->reductions); - XFREE (state_table[i]->errs); - free (state_table[i]); - } - XFREE (state_table); } -/*------------------------------------------------------------. -| Copy the parser code from SKEL_FILENAME into OOUT obstack. | -| and do the muscle substitution. | -`------------------------------------------------------------*/ +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ static void -output_parser (const char *skel_filename, FILE *out) +output_skeleton (void) { - int c; - FILE *fskel; - size_t line; + /* 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); - fskel = xfopen (skel_filename, "r"); + m4_invoke (tempfile); - /* New output code. */ - line = 1; - c = getc (fskel); - while (c != EOF) - { - if (c != '%') - { - if (c == '\n') - ++line; - putc (c, out); - c = getc (fskel); - } - else if ((c = getc (fskel)) == '%') - { - /* Read the muscle. */ - const char *muscle_key = 0; - const char *muscle_value = 0; - - while (isalnum (c = getc (fskel)) || c == '-') - obstack_1grow (&muscle_obstack, c); - obstack_1grow (&muscle_obstack, 0); - - /* Output the right value, or see if it's something special. */ - muscle_key = obstack_finish (&muscle_obstack); - muscle_value = muscle_find (muscle_key); - if (!strcmp (muscle_key, "actions")) - actions_output (out, &line); - else if (!strcmp (muscle_key, "line")) - fprintf (out, "%d", line); - else if (muscle_value) - { - fputs (muscle_value, out); - line += get_lines_number (muscle_value); - } - else - { - fputs ("%%", out); - fputs (muscle_key, out); - } - } - else - putc ('%', out); - } + /* If `debugging', keep this file alive. */ + if (!trace_flag) + unlink (tempfile); - /* End. */ - xfclose (fskel); + free (tempfile); } -/*----------------------------------------. -| Prepare the master parser to be output | -`----------------------------------------*/ - static void -output_master_parser (void) +prepare (void) { - FILE *parser = xfopen (parser_file_name, "w"); - if (!skeleton) - { - if (semantic_parser) - skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY); - else - skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE); - } - muscle_insert ("skeleton", skeleton); - muscle_insert ("parser-file-name", parser_file_name); - - output_parser (skeleton, parser); - xfclose (parser); -} + /* Flags. */ + MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("defines_flag", defines_flag); + MUSCLE_INSERT_INT ("error_verbose", error_verbose); + MUSCLE_INSERT_INT ("pure", pure_parser); + MUSCLE_INSERT_INT ("debug", debug_flag); + /* 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 ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); + 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); -/* FIXME. */ + /* Symbols. */ + 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); -#define MUSCLE_INSERT_INT(Key, Value) \ -{ \ - obstack_fgrow1 (&muscle_obstack, "%d", Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ -} + /* Rules. */ + MUSCLE_INSERT_INT ("rules_number", nrules); -#define MUSCLE_INSERT_STRING(Key, Value) \ -{ \ - obstack_sgrow (&muscle_obstack, Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ -} - -#define MUSCLE_INSERT_PREFIX(Key, Value) \ -{ \ - obstack_fgrow2 (&muscle_obstack, "%s%s", spec_name_prefix, Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ -} - -static void -prepare (void) -{ + /* States. */ MUSCLE_INSERT_INT ("last", high); - MUSCLE_INSERT_INT ("flag", MINSHORT); - MUSCLE_INSERT_INT ("pure", pure_parser); - MUSCLE_INSERT_INT ("nsym", nsyms); - MUSCLE_INSERT_INT ("debug", debug_flag); - MUSCLE_INSERT_INT ("final", final_state); - MUSCLE_INSERT_INT ("maxtok", max_user_token_number); - MUSCLE_INSERT_INT ("ntbase", ntokens); - MUSCLE_INSERT_INT ("error-verbose", error_verbose); - MUSCLE_INSERT_STRING ("prefix", spec_name_prefix); - - 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 ("final_state_number", final_state->number); + MUSCLE_INSERT_INT ("states_number", nstates); + /* 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)); -/*-------------------------. -| Output the header file. | -`-------------------------*/ - -static void -header_output (void) -{ - FILE *out = xfopen (spec_defines_file, "w"); - char *macro_name = compute_header_macro (); - - fprintf (out, "#ifndef %s\n", macro_name); - fprintf (out, "# define %s\n\n", macro_name); - - fputs (muscle_find ("tokendef"), out); - fprintf (out, "\ -#ifndef YYSTYPE\n\ -typedef %s -yystype;\n\ -# define YYSTYPE yystype\n\ -#endif\n", - muscle_find ("stype")); - - if (!pure_parser) - fprintf (out, "\nextern YYSTYPE %slval;\n", - spec_name_prefix); - if (semantic_parser) + /* Find the right skeleton file. */ + if (!skeleton) { - int i; - - for (i = ntokens; i < nsyms; i++) - /* don't make these for dummy nonterminals made by gensym. */ - if (*tags[i] != '@') - fprintf (out, "# define\tNT%s\t%d\n", tags[i], i); + if (glr_parser) + skeleton = "glr.c"; + else + skeleton = "yacc.c"; } - fprintf (out, "\n#endif /* not %s */\n", macro_name); - free (macro_name); - xfclose (out); + /* Parse the skeleton file and output the needed parsers. */ + muscle_insert ("skeleton", skeleton); } @@ -1123,31 +1417,19 @@ yystype;\n\ void output (void) { - obstack_init (&output_obstack); - - output_token_translations (); - output_gram (); + obstack_init (&format_obstack); - XFREE (ritem); - if (semantic_parser) - output_stos (); - output_rule_data (); - XFREE (user_toknums); - output_actions (); + prepare_tokens (); + prepare_rules (); + prepare_states (); + prepare_actions (); prepare (); - /* Copy definitions in directive. */ - obstack_1grow (&attrs_obstack, 0); - muscle_insert ("prologue", obstack_finish (&attrs_obstack)); - - /* Output the parser. */ - output_master_parser (); - /* Output the header if needed. */ - if (defines_flag) - header_output (); - - free (rule_table + 1); - obstack_free (&muscle_obstack, 0); - obstack_free (&output_obstack, 0); - obstack_free (&action_obstack, 0); + + /* Process the selected skeleton file. */ + output_skeleton (); + + obstack_free (&format_obstack, NULL); + obstack_free (&pre_prologue_obstack, NULL); + obstack_free (&post_prologue_obstack, NULL); }