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* src/closure.c (closure): Use arrays instead of pointers to clarify.

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This commit is contained in:
Akim Demaille
2001-11-19 10:38:25 +00:00
parent c87d4863f6
commit 7bec0760a8
2 changed files with 19 additions and 28 deletions
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42
src/closure.c
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@@ -229,50 +229,37 @@ void
closure (short *core, int n)
{
int ruleno;
unsigned word;
short *csp;
unsigned *dsp;
unsigned *rsp;
short *csend;
unsigned *rsend;
int symbol;
int itemno;
int i;
if (trace_flag)
{
int i;
fprintf (stderr, "Entering closure (items = {");
for (i = 0; i < n; ++i)
fprintf (stderr, " %d ", core[i]);
fprintf (stderr, "}, nitems = %d)\n", n);
}
rsp = ruleset;
rsend = ruleset + rulesetsize;
csend = core + n;
if (n == 0)
{
dsp = FDERIVES (start_symbol);
while (rsp < rsend)
*rsp++ = *dsp++;
for (i = 0; i < rulesetsize; ++i)
ruleset[i] = FDERIVES (start_symbol)[i];
}
else
{
while (rsp < rsend)
*rsp++ = 0;
for (i = 0; i < rulesetsize; ++i)
ruleset[i] = 0;
csp = core;
while (csp < csend)
for (i = 0; i < n; ++i)
{
symbol = ritem[*csp++];
int symbol = ritem[core[i]];
if (ISVAR (symbol))
{
dsp = FDERIVES (symbol);
rsp = ruleset;
while (rsp < rsend)
*rsp++ |= *dsp++;
int j;
for (j = 0; j < rulesetsize; ++j)
ruleset[j] |= FDERIVES (symbol)[j];
}
}
}
@@ -280,10 +267,9 @@ closure (short *core, int n)
ruleno = 0;
itemsetend = itemset;
csp = core;
rsp = ruleset;
while (rsp < rsend)
for (i= 0; i < rulesetsize; ++i)
{
word = *rsp++;
int word = ruleset[i];
if (word == 0)
{
ruleno += BITS_PER_WORD;
@@ -297,7 +283,7 @@ closure (short *core, int n)
if (word & (1 << b))
{
itemno = rule_table[ruleno].rhs;
while (csp < csend && *csp < itemno)
while (csp < (core + n ) && *csp < itemno)
*itemsetend++ = *csp++;
*itemsetend++ = itemno;
}
@@ -307,7 +293,7 @@ closure (short *core, int n)
}
}
while (csp < csend)
while (csp < (core + n))
*itemsetend++ = *csp++;
if (trace_flag)