/* 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.
02111-1307, USA. */
-/* The parser tables consist of these tables.
- Starred ones needed only for the semantic parser.
- Double starred are output only if switches are set.
+/* The parser tables consist of these tables. Marked ones needed only
+ for the semantic parser. Double marked are output only if switches
+ are set.
- yytranslate = vector mapping yylex's token numbers into bison's token
- numbers.
+ YYTRANSLATE = vector mapping yylex's token numbers into bison's
+ token numbers.
- ** yytname = vector of string-names indexed by bison token number
+ ++ YYTNAME = vector of string-names indexed by bison token number.
- ** yytoknum = vector of yylex token numbers corresponding to entries
- in yytname
+ ++ YYTOKNUM = vector of yylex token numbers corresponding to
+ entries in YYTNAME.
- yyrline = vector of line-numbers of all rules. For yydebug printouts.
+ YYRLINE = vector of line-numbers of all rules. For yydebug
+ printouts.
- yyrhs = vector of items of all rules.
- This is exactly what ritems contains. For yydebug and for semantic
- parser.
+ YYRHS = vector of items of all rules. This is exactly what RITEMS
+ contains. For yydebug and for semantic parser.
- yyprhs[r] = index in yyrhs of first item for rule r.
+ YYPRHS[R] = index in YYRHS of first item for rule R.
- yyr1[r] = symbol number of symbol that rule r derives.
+ YYR1[R] = symbol number of symbol that rule R derives.
- yyr2[r] = number of symbols composing right hand side of rule r.
+ YYR2[R] = number of symbols composing right hand side of rule R.
- * yystos[s] = the symbol number of the symbol that leads to state s.
+ + YYSTOS[S] = the symbol number of the symbol that leads to state
+ S.
- yydefact[s] = default rule to reduce with in state s,
- when yytable doesn't specify something else to do.
- Zero means the default is an error.
+ YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE
+ doesn't specify something else to do. Zero means the default is an
+ error.
- yydefgoto[i] = default state to go to after a reduction of a rule that
- generates variable ntokens + i, except when yytable
- specifies something else to do.
+ YYDEFGOTO[I] = default state to go to after a reduction of a rule
+ that generates variable NTOKENS + I, except when YYTABLE specifies
+ something else to do.
- yypact[s] = index in yytable of the portion describing state s.
- The lookahead token's type is used to index that portion
- to find out what to do.
+ YYPACT[S] = index in YYTABLE of the portion describing state S.
+ The lookahead token's type is used to index that portion to find
+ out what to do.
- If the value in yytable is positive,
- we shift the token and go to that state.
+ If the value in YYTABLE is positive, we shift the token and go to
+ that state.
If the value is negative, it is minus a rule number to reduce by.
- If the value is zero, the default action from yydefact[s] is used.
+ If the value is zero, the default action from YYDEFACT[S] is used.
- yypgoto[i] = the index in yytable of the portion describing
- what to do after reducing a rule that derives variable i + ntokens.
- This portion is indexed by the parser state number, s,
- as of before the text for this nonterminal was read.
- The value from yytable is the state to go to if
- the corresponding value in yycheck is s.
+ YYPGOTO[I] = the index in YYTABLE of the portion describing what to
+ do after reducing a rule that derives variable I + NTOKENS. This
+ portion is indexed by the parser state number, S, as of before the
+ text for this nonterminal was read. The value from YYTABLE is the
+ state to go to if the corresponding value in YYCHECK is S.
- yytable = a vector filled with portions for different uses,
- found via yypact and yypgoto.
+ YYTABLE = a vector filled with portions for different uses, found
+ via YYPACT and YYPGOTO.
- yycheck = a vector indexed in parallel with yytable.
- It indicates, in a roundabout way, the bounds of the
- portion you are trying to examine.
+ YYCHECK = a vector indexed in parallel with YYTABLE. It indicates,
+ in a roundabout way, the bounds of the portion you are trying to
+ examine.
- Suppose that the portion of yytable starts at index p
- and the index to be examined within the portion is i.
- Then if yycheck[p+i] != i, i is outside the bounds
- of what is actually allocated, and the default
- (from yydefact or yydefgoto) should be used.
- Otherwise, yytable[p+i] should be used.
+ Suppose that the portion of yytable starts at index P and the index
+ to be examined within the portion is I. Then if YYCHECK[P+I] != I,
+ I is outside the bounds of what is actually allocated, and the
+ default (from YYDEFACT or YYDEFGOTO) should be used. Otherwise,
+ YYTABLE[P+I] should be used.
- YYFINAL = the state number of the termination state.
- YYFLAG = most negative short int. Used to flag ??
- YYNTBASE = ntokens.
-*/
+ YYFINAL = the state number of the termination state. YYFLAG = most
+ negative short int. Used to flag ?? */
#include "system.h"
-#include "obstack.h"
+#include "bitsetv.h"
#include "quotearg.h"
+#include "error.h"
#include "getargs.h"
-#include "xalloc.h"
#include "files.h"
#include "gram.h"
#include "LR0.h"
#include "output.h"
#include "lalr.h"
#include "reader.h"
+#include "symtab.h"
#include "conflicts.h"
#include "muscle_tab.h"
-extern void berror PARAMS((const char *));
+/* From lib/readpipe.h. */
+FILE *readpipe PARAMS ((const char *, ...));
+
+/* From src/scan-skel.l. */
+int skel_lex PARAMS ((void));
+extern FILE *skel_in;
static int nvectors;
static int nentries;
-static short **froms;
-static short **tos;
-static short *tally;
-static short *width;
-static short *actrow;
-static short *state_count;
-static short *order;
-static short *base;
-static short *pos;
-static short *table;
-static short *check;
+static short **froms = NULL;
+static short **tos = NULL;
+static short *tally = NULL;
+static short *width = NULL;
+static short *actrow = NULL;
+static short *state_count = NULL;
+static short *order = NULL;
+static short *base = NULL;
+static short *pos = NULL;
+
+/* TABLE_SIZE is the allocated size of both TABLE and CHECK.
+ We start with the original hard-coded value: SHRT_MAX
+ (yes, not USHRT_MAX). */
+static size_t table_size = SHRT_MAX;
+static short *table = NULL;
+static short *check = NULL;
static int lowzero;
static int high;
struct obstack muscle_obstack;
-struct obstack output_obstack;
+static struct obstack format_obstack;
+
+int error_verbose = 0;
-/* FIXME. */
-static inline void
-output_table_data (struct obstack *oout,
- short *table_data,
- short first,
- short begin,
- short end)
+/*----------------------------------------------------------------.
+| 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)
{
- int i;
- int j = 1;
-
- obstack_fgrow1 (oout, "%6d", first);
- for (i = begin; i < end; ++i)
+ size_t old_size = table_size;
+
+ while (table_size <= desired)
+ table_size *= 2;
+
+ if (trace_flag)
+ fprintf (stderr, "growing table and check from: %d to %d\n",
+ old_size, table_size);
+
+ table = XREALLOC (table, short, table_size);
+ check = XREALLOC (check, short, table_size);
+
+ 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));
+/*------------------------------------------------------------------.
+| Create a function NAME which Format the FIRST and then |
+| TABLE_DATA[BEGIN..END[ (of TYPE) into OOUT, and return the number |
+| of bits needed for its longuest value. |
+`------------------------------------------------------------------*/
+
+
+#define GENERATE_OUTPUT_TABLE(Name, Type) \
+ \
+static inline long int \
+Name (struct obstack *oout, \
+ Type *table_data, \
+ Type first, \
+ int begin, \
+ int end) \
+{ \
+ long int max = first; \
+ int i; \
+ int j = 1; \
+ \
+ obstack_fgrow1 (oout, "%6d", first); \
+ for (i = begin; i < end; ++i) \
+ { \
+ obstack_1grow (oout, ','); \
+ if (j >= 10) \
+ { \
+ obstack_sgrow (oout, "\n "); \
+ j = 1; \
+ } \
+ else \
+ ++j; \
+ obstack_fgrow1 (oout, "%6d", table_data[i]); \
+ if (table_data[i] > max) \
+ max = table_data[i]; \
+ } \
+ obstack_1grow (oout, 0); \
+ \
+ return max; \
}
+GENERATE_OUTPUT_TABLE(output_int_table, int)
+GENERATE_OUTPUT_TABLE(output_short_table, short)
+GENERATE_OUTPUT_TABLE(output_token_number_table, token_number_t)
+GENERATE_OUTPUT_TABLE(output_item_number_table, item_number_t)
+
+
+/*-----------------------------------------------------------------.
+| Prepare the muscles related to the tokens: translate, tname, and |
+| toknum. |
+`-----------------------------------------------------------------*/
static void
-output_gram (void)
+prepare_tokens (void)
{
- output_table_data (&output_obstack, rrhs,
- 0, 1, nrules + 1);
- muscle_insert ("prhs", obstack_finish (&output_obstack));
-
+ long int max = output_token_number_table (&format_obstack,
+ token_translations,
+ 0, 1, max_user_token_number + 1);
+ muscle_insert ("translate", obstack_finish (&format_obstack));
+ MUSCLE_INSERT_LONG_INT ("token_number_max", max);
+ XFREE (token_translations);
+
{
- size_t yyrhs_size = 1;
- short *yyrhs, *sp;
int i;
+ int j = 0;
+ for (i = 0; i < nsyms; i++)
+ {
+ /* Be sure not to use twice the same quotearg slot. */
+ const char *cp =
+ quotearg_n_style (1, c_quoting_style,
+ quotearg_style (escape_quoting_style,
+ symbols[i]->tag));
+ /* Width of the next token, including the two quotes, the coma
+ and the space. */
+ int strsize = strlen (cp) + 2;
+
+ if (j + strsize > 75)
+ {
+ obstack_sgrow (&format_obstack, "\n ");
+ j = 2;
+ }
+
+ obstack_sgrow (&format_obstack, cp);
+ obstack_sgrow (&format_obstack, ", ");
+ j += strsize;
+ }
+ /* Add a NULL entry to list of tokens (well, 0, as NULL might not be
+ defined). */
+ obstack_sgrow (&format_obstack, "0");
- 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);
+ /* Finish table and store. */
+ obstack_1grow (&format_obstack, 0);
+ muscle_insert ("tname", obstack_finish (&format_obstack));
}
-#if 0
- if (!semantic_parser && !no_parser_flag)
- obstack_sgrow (&table_obstack, "\n#endif\n");
-#endif
+ /* Output YYTOKNUM. */
+ {
+ int i;
+ short *values = XCALLOC (short, ntokens + 1);
+ for (i = 0; i < ntokens + 1; ++i)
+ values[i] = symbols[i]->user_token_number;
+ output_short_table (&format_obstack, values,
+ 0, 1, ntokens + 1);
+ muscle_insert ("toknum", obstack_finish (&format_obstack));
+ free (values);
+ }
}
+/*-------------------------------------------------------------.
+| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
+| rline. |
+`-------------------------------------------------------------*/
+
static void
-output_stos (void)
+prepare_rules (void)
{
- output_table_data (&output_obstack, accessing_symbol,
- 0, 1, nstates);
- muscle_insert ("stos", obstack_finish (&output_obstack));
-}
+ long int max;
+ item_number_t *rhsp;
+ int r;
+ int i = 0;
+ item_number_t *rhs = XMALLOC (item_number_t, nritems);
+ short *prhs = XMALLOC (short, nrules + 1);
+ token_number_t *r1 = XMALLOC (token_number_t, nrules + 1);
+ short *r2 = XMALLOC (short, nrules + 1);
+ short *rline = XMALLOC (short, nrules + 1);
+
+ for (r = 1; r < nrules + 1; ++r)
+ {
+ /* Index of rule R in RHS. */
+ prhs[r] = i;
+ /* RHS of the rule R. */
+ for (rhsp = rules[r].rhs; *rhsp >= 0; ++rhsp)
+ rhs[i++] = *rhsp;
+ /* LHS of the rule R. */
+ r1[r] = rules[r].lhs->number;
+ /* Length of rule R's RHS. */
+ r2[r] = i - prhs[r];
+ /* Separator in RHS. */
+ rhs[i++] = -1;
+ /* Line where rule was defined. */
+ rline[r] = rules[r].line;
+ }
+ assert (i == nritems);
+ max = output_int_table (&format_obstack, rhs, ritem[0], 1, nritems);
+ muscle_insert ("rhs", obstack_finish (&format_obstack));
+ MUSCLE_INSERT_LONG_INT ("rhs_number_max", max);
-static void
-output_rule_data (void)
-{
- int i;
- int j;
- short *short_tab = NULL;
+ output_short_table (&format_obstack, prhs, 0, 1, nrules + 1);
+ muscle_insert ("prhs", obstack_finish (&format_obstack));
- output_table_data (&output_obstack, rline,
- 0, 1, nrules + 1);
- muscle_insert ("rline", obstack_finish (&output_obstack));
+ output_short_table (&format_obstack, rline, 0, 1, nrules + 1);
+ muscle_insert ("rline", obstack_finish (&format_obstack));
- j = 0;
- for (i = 0; i < nsyms; i++)
- /* this used to be i<=nsyms, but that output a final "" symbol
- almost by accident */
- {
- /* Width of the next token, including the two quotes, the coma
- and the space. */
- int strsize = 4;
- char *p;
-
- for (p = tags[i]; p && *p; p++)
- if (*p == '"' || *p == '\\' || *p == '\n' || *p == '\t'
- || *p == '\b')
- strsize += 2;
- else if (*p < 040 || *p >= 0177)
- strsize += 4;
- else
- strsize++;
-
- if (j + strsize > 75)
- {
- obstack_sgrow (&output_obstack, "\n ");
- j = 2;
- }
+ output_token_number_table (&format_obstack, r1, 0, 1, nrules + 1);
+ muscle_insert ("r1", obstack_finish (&format_obstack));
- obstack_1grow (&output_obstack, '\"');
- for (p = tags[i]; p && *p; p++)
- {
- if (*p == '"' || *p == '\\')
- obstack_fgrow1 (&output_obstack, "\\%c", *p);
- else if (*p == '\n')
- obstack_sgrow (&output_obstack, "\\n");
- else if (*p == '\t')
- obstack_sgrow (&output_obstack, "\\t");
- else if (*p == '\b')
- obstack_sgrow (&output_obstack, "\\b");
- else if (*p < 040 || *p >= 0177)
- obstack_fgrow1 (&output_obstack, "\\%03o", *p);
- else
- obstack_1grow (&output_obstack, *p);
- }
+ output_short_table (&format_obstack, r2, 0, 1, nrules + 1);
+ muscle_insert ("r2", obstack_finish (&format_obstack));
- obstack_sgrow (&output_obstack, "\", ");
- j += strsize;
- }
- /* add a NULL entry to list of tokens */
- obstack_sgrow (&output_obstack, "NULL");
-
- /* Finish table and store. */
- obstack_1grow (&output_obstack, 0);
- muscle_insert ("tname", obstack_finish (&output_obstack));
-
- /* Output YYTOKNUM. */
- output_table_data (&output_obstack, user_toknums,
- 0, 1, ntokens + 1);
- muscle_insert ("toknum", obstack_finish (&output_obstack));
-
- /* Output YYR1. */
- output_table_data (&output_obstack, rlhs,
- 0, 1, nrules + 1);
- muscle_insert ("r1", obstack_finish (&output_obstack));
- XFREE (rlhs + 1);
-
- /* Output YYR2. */
- short_tab = XMALLOC (short, nrules + 1);
- for (i = 1; i < nrules; i++)
- short_tab[i] = rrhs[i + 1] - rrhs[i] - 1;
- short_tab[nrules] = nitems - rrhs[nrules] - 1;
- output_table_data (&output_obstack, short_tab,
- 0, 1, nrules + 1);
- muscle_insert ("r2", obstack_finish (&output_obstack));
- XFREE (short_tab);
-
- XFREE (rrhs + 1);
+ free (rhs);
+ free (prhs);
+ free (r2);
}
+/*--------------------------------------------.
+| Prepare the muscles related to the states. |
+`--------------------------------------------*/
+
+static void
+prepare_states (void)
+{
+ size_t i;
+ token_number_t *values =
+ (token_number_t *) alloca (sizeof (token_number_t) * nstates);
+ for (i = 0; i < nstates; ++i)
+ values[i] = states[i]->accessing_symbol;
+ output_token_number_table (&format_obstack, values,
+ 0, 1, nstates);
+ muscle_insert ("stos", obstack_finish (&format_obstack));
+}
+
+
/*------------------------------------------------------------------.
| Decide what to do for each type of token if seen as the lookahead |
| token in specified state. The value returned is used as the |
| default action (yydefact) for the state. In addition, actrow is |
| filled with what to do for each kind of token, index by symbol |
| number, with zero meaning do the default action. The value |
-| MINSHORT, a very negative number, means this situation is an |
+| SHRT_MIN, a very negative number, means this situation is an |
| error. The parser recognizes this value specially. |
| |
| This is where conflicts are resolved. The loop over lookahead |
`------------------------------------------------------------------*/
static int
-action_row (int state)
+action_row (state_t *state)
{
int i;
- int j;
- int k;
- int m = 0;
- int n = 0;
- int count;
- int default_rule;
- int nreds;
- int max;
- int rule;
- int shift_state;
- int symbol;
- unsigned mask;
- unsigned *wordp;
- reductions *redp;
- shifts *shiftp;
- errs *errp;
- int nodefault = 0; /* set nonzero to inhibit having any default reduction */
+ int default_rule = 0;
+ reductions *redp = state->reductions;
+ shifts *shiftp = state->shifts;
+ errs *errp = state->errs;
+ /* set nonzero to inhibit having any default reduction */
+ int nodefault = 0;
for (i = 0; i < ntokens; i++)
actrow[i] = 0;
- default_rule = 0;
- nreds = 0;
- redp = reduction_table[state];
-
- if (redp)
+ if (redp->nreds >= 1)
{
- nreds = redp->nreds;
-
- if (nreds >= 1)
- {
- /* loop over all the rules available here which require
- lookahead */
- m = lookaheads[state];
- n = lookaheads[state + 1];
-
- for (i = n - 1; i >= m; i--)
- {
- rule = -LAruleno[i];
- wordp = LA + i * tokensetsize;
- mask = 1;
-
- /* and find each token which the rule finds acceptable
- to come next */
- for (j = 0; j < ntokens; j++)
- {
- /* and record this rule as the rule to use if that
- token follows. */
- if (mask & *wordp)
- actrow[j] = rule;
-
- mask <<= 1;
- if (mask == 0)
- {
- mask = 1;
- wordp++;
- }
- }
- }
- }
+ int j;
+ /* loop over all the rules available here which require
+ lookahead */
+ for (i = state->nlookaheads - 1; i >= 0; --i)
+ /* and find each token which the rule finds acceptable
+ to come next */
+ for (j = 0; j < ntokens; j++)
+ /* and record this rule as the rule to use if that
+ token follows. */
+ if (bitset_test (LA[state->lookaheadsp + i], j))
+ actrow[j] = -LArule[state->lookaheadsp + i]->number;
}
- shiftp = shift_table[state];
-
/* Now see which tokens are allowed for shifts in this state. For
them, record the shift as the thing to do. So shift is preferred
to reduce. */
-
- if (shiftp)
+ for (i = 0; i < shiftp->nshifts; i++)
{
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- shift_state = shiftp->shifts[i];
- if (!shift_state)
- continue;
+ token_number_t symbol;
+ int shift_state = shiftp->shifts[i];
+ if (!shift_state)
+ continue;
- symbol = accessing_symbol[shift_state];
+ symbol = states[shift_state]->accessing_symbol;
- if (ISVAR (symbol))
- break;
+ if (ISVAR (symbol))
+ break;
- actrow[symbol] = shift_state;
+ actrow[symbol] = shift_state;
- /* Do not use any default reduction if there is a shift for
- error */
- if (symbol == error_token_number)
- nodefault = 1;
- }
+ /* Do not use any default reduction if there is a shift for
+ error */
+ if (symbol == errtoken->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)
+ %nonassoc). For them, record SHRT_MIN as the action. */
+ for (i = 0; i < errp->nerrs; i++)
{
- k = errp->nerrs;
-
- for (i = 0; i < k; i++)
- {
- symbol = errp->errs[i];
- actrow[symbol] = MINSHORT;
- }
+ int symbol = errp->errs[i];
+ actrow[symbol] = SHRT_MIN;
}
/* Now find the most common reduction and make it the default action
for this state. */
- if (nreds >= 1 && !nodefault)
+ if (redp->nreds >= 1 && !nodefault)
{
- if (consistent[state])
+ if (state->consistent)
default_rule = redp->rules[0];
else
{
- max = 0;
- for (i = m; i < n; i++)
+ int max = 0;
+ for (i = 0; i < state->nlookaheads; i++)
{
- count = 0;
- rule = -LAruleno[i];
+ int count = 0;
+ int rule = -LArule[state->lookaheadsp + i]->number;
+ int j;
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == rule)
- count++;
- }
+ if (actrow[j] == rule)
+ count++;
if (count > max)
{
if (max > 0)
{
+ int j;
for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == default_rule)
- actrow[j] = 0;
- }
+ if (actrow[j] == default_rule)
+ actrow[j] = 0;
default_rule = -default_rule;
}
So replace any action which says "error" with "use default". */
if (default_rule == 0)
- for (j = 0; j < ntokens; j++)
- {
- if (actrow[j] == MINSHORT)
- actrow[j] = 0;
- }
+ for (i = 0; i < ntokens; i++)
+ if (actrow[i] == SHRT_MIN)
+ actrow[i] = 0;
return default_rule;
}
count = 0;
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- count++;
- }
+ if (actrow[i] != 0)
+ count++;
if (count == 0)
return;
tos[state] = sp2 = XCALLOC (short, count);
for (i = 0; i < ntokens; i++)
- {
- if (actrow[i] != 0)
- {
- *sp1++ = i;
- *sp2++ = actrow[i];
- }
- }
+ if (actrow[i] != 0)
+ {
+ *sp1++ = i;
+ *sp2++ = actrow[i];
+ }
tally[state] = count;
width[state] = sp1[-1] - sp[0] + 1;
static void
token_actions (void)
{
- int i;
+ size_t i;
short *yydefact = XCALLOC (short, nstates);
actrow = XCALLOC (short, ntokens);
for (i = 0; i < nstates; ++i)
{
- yydefact[i] = action_row (i);
+ yydefact[i] = action_row (states[i]);
save_row (i);
}
- output_table_data (&output_obstack, yydefact,
+ output_short_table (&format_obstack, yydefact,
yydefact[0], 1, nstates);
- muscle_insert ("defact", obstack_finish (&output_obstack));
-
+ muscle_insert ("defact", obstack_finish (&format_obstack));
+
XFREE (actrow);
XFREE (yydefact);
}
-static void
-free_shifts (void)
+/*-----------------------------.
+| Output the actions to OOUT. |
+`-----------------------------*/
+
+void
+actions_output (FILE *out)
{
- shifts *sp, *sptmp; /* JF derefrenced freed ptr */
+ int rule;
+ for (rule = 1; rule < nrules + 1; ++rule)
+ if (rules[rule].action)
+ {
+ fprintf (out, " case %d:\n", rule);
+
+ if (!no_lines_flag)
+ fprintf (out, muscle_find ("linef"),
+ rules[rule].action_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ /* As a Bison extension, add the ending semicolon. Since some
+ Yacc don't do that, help people using bison as a Yacc
+ finding their missing semicolons. */
+ fprintf (out, "{ %s%s }\n break;\n\n",
+ rules[rule].action,
+ yacc_flag ? ";" : "");
+ }
+}
- XFREE (shift_table);
- for (sp = first_shift; sp; sp = sptmp)
- {
- sptmp = sp->next;
- XFREE (sp);
- }
+/*----------------------------.
+| Output the guards to OOUT. |
+`----------------------------*/
+
+void
+guards_output (FILE *out)
+{
+ int rule;
+ for (rule = 1; rule < nrules + 1; ++rule)
+ if (rules[rule].guard)
+ {
+ fprintf (out, " case %d:\n", rule);
+
+ if (!no_lines_flag)
+ fprintf (out, muscle_find ("linef"),
+ rules[rule].guard_line,
+ quotearg_style (c_quoting_style,
+ muscle_find ("filename")));
+ fprintf (out, "{ %s; }\n break;\n\n",
+ rules[rule].guard);
+ }
}
-static void
-free_reductions (void)
+/*---------------------------------------.
+| Output the tokens definition to OOUT. |
+`---------------------------------------*/
+
+void
+token_definitions_output (FILE *out)
{
- reductions *rp, *rptmp; /* JF fixed freed ptr */
+ int i;
+ int first = 1;
+ for (i = 0; i < ntokens; ++i)
+ {
+ symbol_t *symbol = symbols[i];
+ int number = symbol->user_token_number;
+
+ if (number == SALIAS)
+ continue;
+ /* Skip error token. */
+ if (symbol == errtoken)
+ continue;
+ if (symbol->tag[0] == '\'')
+ continue; /* skip literal character */
+ if (symbol->tag[0] == '\"')
+ {
+ /* use literal string only if given a symbol with an alias */
+ if (symbol->alias)
+ symbol = symbol->alias;
+ else
+ continue;
+ }
- XFREE (reduction_table);
+ /* 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;
- for (rp = first_reduction; rp; rp = rptmp)
- {
- rptmp = rp->next;
- XFREE (rp);
+ fprintf (out, "%s [[[%s]], [%d]]",
+ first ? "" : ",\n", symbol->tag, number);
+ if (semantic_parser)
+ /* FIXME: This is probably wrong, and should be just as
+ above. --akim. */
+ fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->number);
+ first = 0;
}
}
-
static void
save_column (int symbol, int default_state)
{
short *sp1;
short *sp2;
int count;
- int symno;
+ int symno = symbol - ntokens + nstates;
short begin = goto_map[symbol];
short end = goto_map[symbol + 1];
count = 0;
for (i = begin; i < end; i++)
- {
- if (to_state[i] != default_state)
- count++;
- }
+ if (to_state[i] != default_state)
+ count++;
if (count == 0)
return;
- symno = symbol - ntokens + nstates;
-
froms[symno] = sp1 = sp = XCALLOC (short, count);
tos[symno] = sp2 = XCALLOC (short, count);
for (i = begin; i < end; i++)
- {
- if (to_state[i] != default_state)
- {
- *sp1++ = from_state[i];
- *sp2++ = to_state[i];
- }
- }
+ if (to_state[i] != default_state)
+ {
+ *sp1++ = from_state[i];
+ *sp2++ = to_state[i];
+ }
tally[symno] = count;
width[symno] = sp1[-1] - sp[0] + 1;
static int
default_goto (int symbol)
{
- int i;
- int m;
- int n;
- int default_state;
- int max;
-
- m = goto_map[symbol];
- n = goto_map[symbol + 1];
+ size_t i;
+ size_t m = goto_map[symbol];
+ size_t n = goto_map[symbol + 1];
+ int default_state = -1;
+ int max = 0;
if (m == n)
return -1;
for (i = m; i < n; i++)
state_count[to_state[i]]++;
- max = 0;
- default_state = -1;
-
for (i = 0; i < nstates; i++)
- {
- if (state_count[i] > max)
- {
- max = state_count[i];
- default_state = i;
- }
- }
+ if (state_count[i] > max)
+ {
+ max = state_count[i];
+ default_state = i;
+ }
return default_state;
}
yydefgoto[i - ntokens] = default_state;
}
- output_table_data (&output_obstack, yydefgoto,
+ output_short_table (&format_obstack, yydefgoto,
yydefgoto[0], 1, nsyms - ntokens);
- muscle_insert ("defgoto", obstack_finish (&output_obstack));
+ muscle_insert ("defgoto", obstack_finish (&format_obstack));
XFREE (state_count);
XFREE (yydefgoto);
sort_actions (void)
{
int i;
- int j;
- int k;
- int t;
- int w;
order = XCALLOC (short, nvectors);
nentries = 0;
for (i = 0; i < nvectors; i++)
- {
- if (tally[i] > 0)
- {
- t = tally[i];
- w = width[i];
- j = nentries - 1;
+ if (tally[i] > 0)
+ {
+ int k;
+ int t = tally[i];
+ int w = width[i];
+ int j = nentries - 1;
- while (j >= 0 && (width[order[j]] < w))
- j--;
+ while (j >= 0 && (width[order[j]] < w))
+ j--;
- while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
- j--;
+ while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t))
+ j--;
- for (k = nentries - 1; k > j; k--)
- order[k + 1] = order[k];
+ for (k = nentries - 1; k > j; k--)
+ order[k + 1] = order[k];
- order[j + 1] = i;
- nentries++;
- }
- }
+ order[j + 1] = i;
+ nentries++;
+ }
}
static int
matching_state (int vector)
{
- int i;
- int j;
- int k;
+ int i = order[vector];
int t;
int w;
- int match;
int prev;
- i = order[vector];
- if (i >= nstates)
+ if (i >= (int) nstates)
return -1;
t = tally[i];
for (prev = vector - 1; prev >= 0; prev--)
{
- j = order[prev];
+ int j = order[prev];
+ int k;
+ int match = 1;
+
if (width[j] != w || tally[j] != t)
return -1;
- match = 1;
for (k = 0; match && k < t; k++)
- {
- if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k])
- match = 0;
- }
+ if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k])
+ match = 0;
if (match)
return j;
static int
pack_vector (int vector)
{
- int i;
+ int i = order[vector];
int j;
- int k;
- int t;
+ int t = tally[i];
int loc = 0;
- int ok;
- short *from;
- short *to;
-
- i = order[vector];
- t = tally[i];
+ short *from = froms[i];
+ short *to = tos[i];
assert (t);
- from = froms[i];
- to = tos[i];
-
- for (j = lowzero - from[0]; j < MAXTABLE; j++)
+ 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);
+ 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)
{
return j;
}
}
-
- berror ("pack_vector");
- return 0; /* JF keep lint happy */
+#define pack_vector_succeeded 0
+ assert (pack_vector_succeeded);
+ return 0;
}
base = XCALLOC (short, nvectors);
pos = XCALLOC (short, nentries);
- table = XCALLOC (short, MAXTABLE);
- check = XCALLOC (short, MAXTABLE);
+ table = XCALLOC (short, table_size);
+ check = XCALLOC (short, table_size);
lowzero = 0;
high = 0;
for (i = 0; i < nvectors; i++)
- base[i] = MINSHORT;
+ base[i] = SHRT_MIN;
- for (i = 0; i < MAXTABLE; i++)
+ for (i = 0; i < (int) table_size; i++)
check[i] = -1;
for (i = 0; i < nentries; i++)
for (i = 0; i < nvectors; i++)
{
- if (froms[i])
- XFREE (froms[i]);
- if (tos[i])
- XFREE (tos[i]);
+ XFREE (froms[i]);
+ XFREE (tos[i]);
}
XFREE (froms);
output_base (void)
{
/* Output pact. */
- output_table_data (&output_obstack, base,
+ output_short_table (&format_obstack, base,
base[0], 1, nstates);
- muscle_insert ("pact", obstack_finish (&output_obstack));
+ muscle_insert ("pact", obstack_finish (&format_obstack));
/* Output pgoto. */
- output_table_data (&output_obstack, base,
+ output_short_table (&format_obstack, base,
base[nstates], nstates + 1, nvectors);
- muscle_insert ("pgoto", obstack_finish (&output_obstack));
+ muscle_insert ("pgoto", obstack_finish (&format_obstack));
XFREE (base);
}
static void
output_table (void)
{
- output_table_data (&output_obstack, table,
+ output_short_table (&format_obstack, table,
table[0], 1, high + 1);
- muscle_insert ("table", obstack_finish (&output_obstack));
+ muscle_insert ("table", obstack_finish (&format_obstack));
XFREE (table);
}
static void
output_check (void)
{
- output_table_data (&output_obstack, check,
+ output_short_table (&format_obstack, check,
check[0], 1, high + 1);
- muscle_insert ("check", obstack_finish (&output_obstack));
+ muscle_insert ("check", obstack_finish (&format_obstack));
XFREE (check);
}
-/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable
- and yycheck. */
+/*-----------------------------------------------------------------.
+| Compute and output yydefact, yydefgoto, yypact, yypgoto, yytable |
+| and yycheck. |
+`-----------------------------------------------------------------*/
static void
output_actions (void)
{
+ size_t i;
nvectors = nstates + nvars;
froms = XCALLOC (short *, nvectors);
width = XCALLOC (short, nvectors);
token_actions ();
- free_shifts ();
- free_reductions ();
- XFREE (lookaheads);
- XFREE (LA);
- XFREE (LAruleno);
- XFREE (accessing_symbol);
+ bitsetv_free (LA);
+ free (LArule);
goto_actions ();
XFREE (goto_map + ntokens);
output_table ();
output_check ();
-}
-
-\f
-/*------------------------------------------------------------.
-| Copy the parser code from SKEL_FILENAME into OOUT obstack. |
-| and do the muscle substitution. |
-`------------------------------------------------------------*/
-
-static void
-output_parser (const char *skel_filename, struct obstack *oout)
-{
- int c;
- FILE *fskel;
- size_t line;
-
- fskel = xfopen (skel_filename, "r");
-
- /* New output code. */
- line = 1;
- c = getc (fskel);
- while (c != EOF)
- {
- if (c != '%')
- {
- if (c == '\n')
- ++line;
- obstack_1grow (oout, c);
- 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 (muscle_value)
- obstack_sgrow (oout, muscle_value);
- else if (!strcmp (muscle_key, "line"))
- obstack_fgrow1 (oout, "%d", line + 1);
- else if (!strcmp (muscle_key, "input_line"))
- obstack_fgrow1 (oout, "%d", lineno);
- else if (!strcmp (muscle_key, "action"))
- {
- size_t size = obstack_object_size (&action_obstack);
- obstack_grow (oout, obstack_base (&action_obstack), size);
- }
- /* FIXME: Insert the code to recognize %%sub-skeleton for exemple. */
- else
- {
- obstack_sgrow (oout, "%%");
- obstack_sgrow (oout, muscle_key);
- }
- }
- else
- obstack_1grow (oout, '%');
- }
-
- /* End. */
- xfclose (fskel);
-}
-/*----------------------------------------.
-| Prepare the master parser to be output |
-`----------------------------------------*/
-
-static void
-output_master_parser (void)
-{
- if (!skeleton)
+ for (i = 0; i < nstates; ++i)
{
- if (semantic_parser)
- skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY);
- else
- skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE);
+ free (states[i]->shifts);
+ XFREE (states[i]->reductions);
+ free (states[i]->errs);
+ free (states[i]);
}
-
- obstack_finish (&action_obstack);
- output_parser (skeleton, &table_obstack);
+ XFREE (states);
}
+\f
+/*---------------------------.
+| Call the skeleton parser. |
+`---------------------------*/
static void
-free_itemsets (void)
+output_skeleton (void)
{
- core *cp, *cptmp;
-
- XFREE (state_table);
-
- for (cp = first_state; cp; cp = cptmp)
- {
- cptmp = cp->next;
- XFREE (cp);
- }
-}
-
-/* FIXME. */
-
-#define MUSCLE_INSERT_INT(Key, Value) \
-{ \
- obstack_fgrow1 (&muscle_obstack, "%d", Value); \
- obstack_1grow (&muscle_obstack, 0); \
- muscle_insert (Key, obstack_finish (&muscle_obstack)); \
-}
-
-#define MUSCLE_INSERT_STRING(Key, Value) \
-{ \
- obstack_sgrow (&muscle_obstack, Value); \
- obstack_1grow (&muscle_obstack, 0); \
- muscle_insert (Key, obstack_finish (&muscle_obstack)); \
-}
-
-#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)); \
+ /* Store the definition of all the muscles. */
+ const char *tempdir = getenv ("TMPDIR");
+ char *tempfile = NULL;
+ FILE *out = NULL;
+ int fd;
+
+ if (tempdir == NULL)
+ tempdir = DEFAULT_TMPDIR;
+ tempfile = xmalloc (strlen (tempdir) + 11);
+ sprintf (tempfile, "%s/bsnXXXXXX", tempdir);
+ fd = mkstemp (tempfile);
+ if (fd == -1)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ out = fdopen (fd, "w");
+ if (out == NULL)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ /* There are no comments, especially not `#': we do want M4 expansion
+ after `#': think of CPP macros! */
+ fputs ("m4_changecom()\n", out);
+ fputs ("m4_init()\n", out);
+
+ fputs ("m4_define([b4_actions], \n[[", out);
+ actions_output (out);
+ fputs ("]])\n\n", out);
+
+ fputs ("m4_define([b4_guards], \n[[", out);
+ guards_output (out);
+ fputs ("]])\n\n", out);
+
+ fputs ("m4_define([b4_tokens], \n[", out);
+ token_definitions_output (out);
+ fputs ("])\n\n", out);
+
+ muscles_m4_output (out);
+
+ fputs ("m4_wrap([m4_divert_pop(0)])\n", out);
+ fputs ("m4_divert_push(0)dnl\n", out);
+ xfclose (out);
+
+ /* Invoke m4 on the definition of the muscles, and the skeleton. */
+ {
+ const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
+ const char *m4 = getenv ("M4");
+ if (!m4)
+ m4 = M4;
+ if (!bison_pkgdatadir)
+ bison_pkgdatadir = PKGDATADIR;
+ if (trace_flag)
+ fprintf (stderr,
+ "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
+ m4, bison_pkgdatadir, tempfile, skeleton);
+ skel_in = readpipe (m4,
+ "-I", bison_pkgdatadir,
+ "m4sugar/m4sugar.m4",
+ tempfile,
+ skeleton,
+ NULL);
+ if (!skel_in)
+ error (EXIT_FAILURE, errno, "cannot run m4");
+ skel_lex ();
+
+ /* If `debugging', keep this file alive. */
+ if (!trace_flag)
+ unlink (tempfile);
+ }
}
static void
prepare (void)
{
MUSCLE_INSERT_INT ("last", high);
- MUSCLE_INSERT_INT ("flag", MINSHORT);
+ MUSCLE_INSERT_INT ("flag", SHRT_MIN);
MUSCLE_INSERT_INT ("pure", pure_parser);
MUSCLE_INSERT_INT ("nsym", nsyms);
MUSCLE_INSERT_INT ("debug", debug_flag);
MUSCLE_INSERT_INT ("final", final_state);
- MUSCLE_INSERT_INT ("maxtok", max_user_token_number);
- MUSCLE_INSERT_INT ("ntbase", ntokens);
- MUSCLE_INSERT_INT ("verbose", 0);
+ MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
+ MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
+ MUSCLE_INSERT_INT ("error_verbose", error_verbose);
+ MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
+
+ /* FIXME: This is wrong: the muscles should decide whether they hold
+ a copy or not, but the situation is too obscure currently. */
+ MUSCLE_INSERT_STRING ("output_infix", output_infix ? output_infix : "");
+ MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
+ MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
+ MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);
MUSCLE_INSERT_INT ("nnts", nvars);
MUSCLE_INSERT_INT ("nrules", nrules);
MUSCLE_INSERT_INT ("ntokens", ntokens);
MUSCLE_INSERT_INT ("locations_flag", locations_flag);
+ MUSCLE_INSERT_INT ("defines_flag", defines_flag);
- if (spec_name_prefix)
- MUSCLE_INSERT_STRING ("prefix", spec_name_prefix);
+ /* Copy definitions in directive. */
+ obstack_1grow (&attrs_obstack, 0);
+ muscle_insert ("prologue", obstack_finish (&attrs_obstack));
+
+ /* Find the right skeleton file. */
+ if (!skeleton)
+ {
+ if (semantic_parser)
+ skeleton = "bison.hairy";
+ else
+ skeleton = "bison.simple";
+ }
+
+ /* Parse the skeleton file and output the needed parsers. */
+ muscle_insert ("skeleton", skeleton);
}
+
/*----------------------------------------------------------.
| Output the parsing tables and the parser code to ftable. |
`----------------------------------------------------------*/
void
output (void)
{
- obstack_init (&output_obstack);
-
- free_itemsets ();
-
- output_token_translations ();
- output_gram ();
+ obstack_init (&format_obstack);
- XFREE (ritem);
- if (semantic_parser)
- output_stos ();
- output_rule_data ();
+ prepare_tokens ();
+ prepare_rules ();
+ prepare_states ();
output_actions ();
-
-#if 0
- if (!no_parser_flag) */
-#endif
+
prepare ();
- /* Copy definitions in directive. */
- muscle_insert ("prologue", obstack_finish (&attrs_obstack));
- output_master_parser ();
+ /* Process the selected skeleton file. */
+ output_skeleton ();
- obstack_free (&muscle_obstack, 0);
- obstack_free (&output_obstack, 0);
+ obstack_free (&muscle_obstack, NULL);
+ obstack_free (&format_obstack, NULL);
+ obstack_free (&action_obstack, NULL);
+ obstack_free (&attrs_obstack, NULL);
}
projects / bison.git / blobdiff