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"Compiling" version

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Guido van Rossum 1990-12-20 15:06:42 +00:00
parent 226d79eb4a
commit 3f5da24ea3
72 changed files with 3363 additions and 2061 deletions
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77
Parser/acceler.c
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@ -1,11 +1,52 @@
/* Parser accelerator module */
#include <stdio.h>
/* The parser as originally conceived had disappointing performance.
This module does some precomputation that speeds up the selection
of a DFA based upon a token, turning a search through an array
into a simple indexing operation. The parser now cannot work
without the accelerators installed. Note that the accelerators
are installed dynamically when the parser is initialized, they
are not part of the static data structure written on graminit.[ch]
by the parser generator. */
#include "PROTO.h"
#include "pgenheaders.h"
#include "grammar.h"
#include "token.h"
#include "malloc.h"
#include "parser.h"
/* Forward references */
static void fixdfa PROTO((grammar *, dfa *));
static void fixstate PROTO((grammar *, dfa *, state *));
void
addaccelerators(g)
grammar *g;
{
dfa *d;
int i;
#ifdef DEBUG
printf("Adding parser accellerators ...\n");
#endif
d = g->g_dfa;
for (i = g->g_ndfas; --i >= 0; d++)
fixdfa(g, d);
g->g_accel = 1;
#ifdef DEBUG
printf("Done.\n");
#endif
}
static void
fixdfa(g, d)
grammar *g;
dfa *d;
{
state *s;
int j;
s = d->d_state;
for (j = 0; j < d->d_nstates; j++, s++)
fixstate(g, d, s);
}
static void
fixstate(g, d, s)
@ -69,33 +110,3 @@ fixstate(g, d, s)
}
DEL(accel);
}
static void
fixdfa(g, d)
grammar *g;
dfa *d;
{
state *s;
int j;
s = d->d_state;
for (j = 0; j < d->d_nstates; j++, s++)
fixstate(g, d, s);
}
void
addaccelerators(g)
grammar *g;
{
dfa *d;
int i;
#ifdef DEBUG
printf("Adding parser accellerators ...\n");
#endif
d = g->g_dfa;
for (i = g->g_ndfas; --i >= 0; d++)
fixdfa(g, d);
g->g_accel = 1;
#ifdef DEBUG
printf("Done.\n");
#endif
}