/* Output the generated parsing program for Bison.
- Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
- Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004,
+ 2005 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
-
+ Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+#include <config.h>
#include "system.h"
#include <bitsetv.h>
Of course vector_number_t ought to be wide enough to contain
state_number and symbol_number. */
-typedef short vector_number;
+typedef int vector_number;
+#if 0 /* Not currently used. */
static inline vector_number
state_number_to_vector_number (state_number s)
{
return s;
}
+#endif
static inline vector_number
-symbol_number_to_vector_number (symbol_number s)
+symbol_number_to_vector_number (symbol_number sym)
{
- return state_number_as_int (nstates) + s - ntokens;
+ return state_number_as_int (nstates) + sym - ntokens;
}
int nvectors;
#define BASE_MAXIMUM INT_MAX
#define BASE_MINIMUM INT_MIN
-static base_number **froms = NULL;
-static base_number **tos = NULL;
-static unsigned int **conflict_tos = NULL;
-static short *tally = NULL;
-static base_number *width = NULL;
+static base_number **froms;
+static base_number **tos;
+static unsigned int **conflict_tos;
+static int *tally;
+static base_number *width;
/* For a given state, N = ACTROW[SYMBOL]:
If N = MIN, stands for `raise a syntax error'.
If N > 0, stands for `shift SYMBOL and go to n'.
If N < 0, stands for `reduce -N'. */
-typedef short action_number;
-#define ACTION_NUMBER_MINIMUM SHRT_MIN
+typedef int action_number;
+#define ACTION_NUMBER_MINIMUM INT_MIN
-static action_number *actrow = NULL;
+static action_number *actrow;
/* 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 *order = NULL;
+static vector_number *order;
static int nentries;
base_number *base = NULL;
base_number base_ninf = 0;
static base_number *pos = NULL;
-static unsigned int *conflrow = NULL;
-unsigned int *conflict_table = NULL;
-unsigned int *conflict_list = NULL;
+static unsigned int *conflrow;
+unsigned int *conflict_table;
+unsigned int *conflict_list;
int conflict_list_cnt;
static int conflict_list_free;
with more or less the original hard-coded value (which was
SHRT_MAX). */
static int table_size = 32768;
-base_number *table = NULL;
-base_number *check = NULL;
+base_number *table;
+base_number *check;
/* The value used in TABLE to denote explicit syntax errors
(%nonassoc), a negative infinite. First defaults to ACTION_NUMBER_MININUM,
but in order to keep small tables, renumbered as TABLE_ERROR, which
fprintf (stderr, "growing table and check from: %d to %d\n",
old_size, table_size);
- REALLOC (table, table_size);
- REALLOC (check, table_size);
- REALLOC (conflict_table, table_size);
+ table = xnrealloc (table, table_size, sizeof *table);
+ conflict_table = xnrealloc (conflict_table, table_size,
+ sizeof *conflict_table);
+ check = xnrealloc (check, table_size, sizeof *check);
for (/* Nothing. */; old_size < table_size; ++old_size)
{
table[old_size] = 0;
+ conflict_table[old_size] = 0;
check[old_size] = -1;
}
}
/*-------------------------------------------------------------------.
| For GLR parsers, for each conflicted token in S, as indicated |
-| by non-zero entries in CONFLROW, create a list of possible |
+| 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 S. Store the alternative |
| reductions followed by a 0 in CONFLICT_LIST, updating |
int i, j;
reductions *reds = s->reductions;
- if (! glr_parser)
+ if (!nondeterministic_parser)
return;
for (j = 0; j < ntokens; j += 1)
/* Find all reductions for token J, and record all that do not
match ACTROW[J]. */
for (i = 0; i < reds->num; i += 1)
- if (bitset_test (reds->lookaheads[i], j)
+ if (bitset_test (reds->look_ahead_tokens[i], j)
&& (actrow[j]
!= rule_number_as_item_number (reds->rules[i]->number)))
{
- if (conflict_list_free <= 0)
- abort ();
+ assert (0 < conflict_list_free);
conflict_list[conflict_list_cnt] = reds->rules[i]->number + 1;
conflict_list_cnt += 1;
conflict_list_free -= 1;
}
/* Leave a 0 at the end. */
- if (conflict_list_free <= 0)
- abort ();
+ assert (0 < conflict_list_free);
+ conflict_list[conflict_list_cnt] = 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 |
+| Decide what to do for each type of token if seen as the |
+| look-ahead 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 |
| situation is an error. The parser recognizes this value |
| specially. |
| |
-| This is where conflicts are resolved. The loop over lookahead |
+| This is where conflicts are resolved. The loop over look-ahead |
| rules considered lower-numbered rules last, and the last rule |
| considered that likes a token gets to handle it. |
| |
transitions *trans = s->transitions;
errs *errp = s->errs;
/* Set to nonzero to inhibit having any default reduction. */
- int nodefault = 0;
- int conflicted = 0;
+ bool nodefault = false;
+ bool conflicted = false;
for (i = 0; i < ntokens; i++)
actrow[i] = conflrow[i] = 0;
- if (reds->lookaheads)
+ if (reds->look_ahead_tokens)
{
int j;
bitset_iterator biter;
/* loop over all the rules available here which require
- lookahead (in reverse order to give precedence to the first
+ look-ahead (in reverse order to give precedence to the first
rule) */
for (i = reds->num - 1; i >= 0; --i)
/* and find each token which the rule finds acceptable
to come next */
- BITSET_FOR_EACH (biter, reds->lookaheads[i], j, 0)
+ BITSET_FOR_EACH (biter, reds->look_ahead_tokens[i], j, 0)
{
/* and record this rule as the rule to use if that
token follows. */
if (actrow[j] != 0)
- conflicted = conflrow[j] = 1;
+ {
+ conflicted = true;
+ conflrow[j] = 1;
+ }
actrow[j] = rule_number_as_item_number (reds->rules[i]->number);
}
}
state *shift_state = trans->states[i];
if (actrow[sym] != 0)
- conflicted = conflrow[sym] = 1;
+ {
+ conflicted = true;
+ conflrow[sym] = 1;
+ }
actrow[sym] = state_number_as_int (shift_state->number);
/* Do not use any default reduction if there is a shift for
error */
if (sym == errtoken->number)
- nodefault = 1;
+ nodefault = true;
}
/* See which tokens are an explicit error in this state (due to
int j;
for (j = 0; j < ntokens; j++)
if (actrow[j] == rule_number_as_item_number (default_rule->number)
- && ! (glr_parser && conflrow[j]))
+ && ! (nondeterministic_parser && conflrow[j]))
actrow[j] = 0;
}
}
base_number *sp;
base_number *sp1;
base_number *sp2;
- unsigned int *sp3 IF_LINT (= NULL);
+ unsigned int *sp3;
/* Number of non default actions in S. */
count = 0;
return;
/* Allocate non defaulted actions. */
- froms[s] = sp = CALLOC (sp1, count);
- tos[s] = CALLOC (sp2, count);
- conflict_tos[s] = glr_parser ? CALLOC (sp3, count) : NULL;
+ froms[s] = sp = sp1 = xnmalloc (count, sizeof *sp1);
+ tos[s] = sp2 = xnmalloc (count, sizeof *sp2);
+ conflict_tos[s] = sp3 =
+ nondeterministic_parser ? xnmalloc (count, sizeof *sp3) : NULL;
/* Store non defaulted actions. */
for (i = 0; i < ntokens; i++)
{
*sp1++ = i;
*sp2++ = actrow[i];
- if (glr_parser)
+ if (nondeterministic_parser)
*sp3++ = conflrow[i];
}
/*------------------------------------------------------------------.
| Figure out the actions for the specified state, indexed by |
-| lookahead token type. |
+| look-ahead token type. |
| |
| The YYDEFACT table is output now. The detailed info is saved for |
| putting into YYTABLE later. |
symbol_number j;
rule_number r;
- int nconflict = glr_parser ? conflicts_total_count () : 0;
+ int nconflict = nondeterministic_parser ? conflicts_total_count () : 0;
- CALLOC (yydefact, nstates);
+ yydefact = xnmalloc (nstates, sizeof *yydefact);
- CALLOC (actrow, ntokens);
- CALLOC (conflrow, ntokens);
+ actrow = xnmalloc (ntokens, sizeof *actrow);
+ conflrow = xnmalloc (ntokens, sizeof *conflrow);
- CALLOC (conflict_list, 1 + 2 * nconflict);
+ conflict_list = xnmalloc (1 + 2 * nconflict, sizeof *conflict_list);
conflict_list_free = 2 * nconflict;
conflict_list_cnt = 1;
/* Find the rules which are reduced. */
- if (!glr_parser)
+ if (!nondeterministic_parser)
for (r = 0; r < nrules; ++r)
rules[r].useful = false;
/* Now that the parser was computed, we can find which rules are
really reduced, and which are not because of SR or RR
conflicts. */
- if (!glr_parser)
+ if (!nondeterministic_parser)
{
for (j = 0; j < ntokens; ++j)
if (actrow[j] < 0 && actrow[j] != ACTION_NUMBER_MINIMUM)
static void
save_column (symbol_number sym, state_number default_state)
{
- int i;
+ goto_number i;
base_number *sp;
base_number *sp1;
base_number *sp2;
return;
/* Allocate room for non defaulted gotos. */
- froms[symno] = sp = CALLOC (sp1, count);
- tos[symno] = CALLOC (sp2, count);
+ froms[symno] = sp = sp1 = xnmalloc (count, sizeof *sp1);
+ tos[symno] = sp2 = xnmalloc (count, sizeof *sp2);
/* Store the state numbers of the non defaulted gotos. */
for (i = begin; i < end; i++)
`-------------------------------------------------------------*/
static state_number
-default_goto (symbol_number sym, short state_count[])
+default_goto (symbol_number sym, size_t state_count[])
{
state_number s;
- int i;
+ goto_number i;
goto_number m = goto_map[sym - ntokens];
goto_number n = goto_map[sym - ntokens + 1];
state_number default_state = -1;
- int max = 0;
+ size_t max = 0;
if (m == n)
return -1;
goto_actions (void)
{
symbol_number i;
- short *state_count = CALLOC (state_count, nstates);
- MALLOC (yydefgoto, nvars);
+ size_t *state_count = xnmalloc (nstates, sizeof *state_count);
+ yydefgoto = xnmalloc (nvars, sizeof *yydefgoto);
/* For a given nterm I, STATE_COUNT[S] is the number of times there
is a GOTO to S on I. */
base_number *to = tos[i];
unsigned int *conflict_to = conflict_tos[i];
- if (! t)
- abort ();
+ assert (t);
for (j = lowzero - from[0]; ; j++)
{
int k;
- int ok = 1;
+ bool ok = true;
- if (table_size <= j)
- abort ();
+ assert (j < table_size);
for (k = 0; ok && k < t; k++)
{
table_grow (loc);
if (table[loc] != 0)
- ok = 0;
+ ok = false;
}
for (k = 0; ok && k < vector; k++)
if (pos[k] == j)
- ok = 0;
+ ok = false;
if (ok)
{
{
loc = j + from[k];
table[loc] = to[k];
- if (glr_parser && conflict_to != NULL)
+ if (nondeterministic_parser && conflict_to != NULL)
conflict_table[loc] = conflict_to[k];
check[loc] = from[k];
}
if (loc > high)
high = loc;
- if (! (BASE_MINIMUM <= j && j <= BASE_MAXIMUM))
- abort ();
+ assert (BASE_MINIMUM <= j && j <= BASE_MAXIMUM);
return j;
}
}
{
int i;
- CALLOC (base, nvectors);
- CALLOC (pos, nentries);
- CALLOC (table, table_size);
- CALLOC (conflict_table, table_size);
- CALLOC (check, table_size);
+ base = xnmalloc (nvectors, sizeof *base);
+ pos = xnmalloc (nentries, sizeof *pos);
+ table = xcalloc (table_size, sizeof *table);
+ conflict_table = xcalloc (table_size, sizeof *conflict_table);
+ check = xnmalloc (table_size, sizeof *check);
lowzero = 0;
high = 0;
/* This is a poor way to make sure the sizes are properly
correlated. In particular the signedness is not taken into
account. But it's not useless. */
- verify (sizes_are_properly_correlated,
- (sizeof nstates <= sizeof nvectors
- && sizeof nvars <= sizeof nvectors));
+ verify (sizeof nstates <= sizeof nvectors
+ && sizeof nvars <= sizeof nvectors);
nvectors = state_number_as_int (nstates) + nvars;
- CALLOC (froms, nvectors);
- CALLOC (tos, nvectors);
- CALLOC (conflict_tos, nvectors);
- CALLOC (tally, nvectors);
- CALLOC (width, nvectors);
+ froms = xcalloc (nvectors, sizeof *froms);
+ tos = xcalloc (nvectors, sizeof *tos);
+ conflict_tos = xcalloc (nvectors, sizeof *conflict_tos);
+ tally = xcalloc (nvectors, sizeof *tally);
+ width = xnmalloc (nvectors, sizeof *width);
token_actions ();
free (from_state);
free (to_state);
- CALLOC (order, nvectors);
+ order = xcalloc (nvectors, sizeof *order);
sort_actions ();
pack_table ();
free (order);
{
free (froms[i]);
free (tos[i]);
- XFREE (conflict_tos[i]);
+ free (conflict_tos[i]);
}
free (froms);
projects / bison.git / blobdiff