Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 1da43e5e916949c8e849e656d9d05fa4b9d6836c authored by Benjamin Peterson on 26 June 2009, 13:21:52 UTC
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
Tip revision: 1da43e5
printgrammar.c
/* Print a bunch of C initializers that represent a grammar */
#include "pgenheaders.h"
#include "grammar.h"
/* Forward */
static void printarcs(int, dfa *, FILE *);
static void printstates(grammar *, FILE *);
static void printdfas(grammar *, FILE *);
static void printlabels(grammar *, FILE *);
void
printgrammar(grammar *g, FILE *fp)
{
fprintf(fp, "/* Generated by Parser/pgen */\n\n");
fprintf(fp, "#include \"pgenheaders.h\"\n");
fprintf(fp, "#include \"grammar.h\"\n");
fprintf(fp, "PyAPI_DATA(grammar) _PyParser_Grammar;\n");
printdfas(g, fp);
printlabels(g, fp);
fprintf(fp, "grammar _PyParser_Grammar = {\n");
fprintf(fp, "\t%d,\n", g->g_ndfas);
fprintf(fp, "\tdfas,\n");
fprintf(fp, "\t{%d, labels},\n", g->g_ll.ll_nlabels);
fprintf(fp, "\t%d\n", g->g_start);
fprintf(fp, "};\n");
}
void
printnonterminals(grammar *g, FILE *fp)
{
dfa *d;
int i;
fprintf(fp, "/* Generated by Parser/pgen */\n\n");
d = g->g_dfa;
for (i = g->g_ndfas; --i >= 0; d++)
fprintf(fp, "#define %s %d\n", d->d_name, d->d_type);
}
static void
printarcs(int i, dfa *d, FILE *fp)
{
arc *a;
state *s;
int j, k;
s = d->d_state;
for (j = 0; j < d->d_nstates; j++, s++) {
fprintf(fp, "static arc arcs_%d_%d[%d] = {\n",
i, j, s->s_narcs);
a = s->s_arc;
for (k = 0; k < s->s_narcs; k++, a++)
fprintf(fp, "\t{%d, %d},\n", a->a_lbl, a->a_arrow);
fprintf(fp, "};\n");
}
}
static void
printstates(grammar *g, FILE *fp)
{
state *s;
dfa *d;
int i, j;
d = g->g_dfa;
for (i = 0; i < g->g_ndfas; i++, d++) {
printarcs(i, d, fp);
fprintf(fp, "static state states_%d[%d] = {\n",
i, d->d_nstates);
s = d->d_state;
for (j = 0; j < d->d_nstates; j++, s++)
fprintf(fp, "\t{%d, arcs_%d_%d},\n",
s->s_narcs, i, j);
fprintf(fp, "};\n");
}
}
static void
printdfas(grammar *g, FILE *fp)
{
dfa *d;
int i, j;
printstates(g, fp);
fprintf(fp, "static dfa dfas[%d] = {\n", g->g_ndfas);
d = g->g_dfa;
for (i = 0; i < g->g_ndfas; i++, d++) {
fprintf(fp, "\t{%d, \"%s\", %d, %d, states_%d,\n",
d->d_type, d->d_name, d->d_initial, d->d_nstates, i);
fprintf(fp, "\t \"");
for (j = 0; j < NBYTES(g->g_ll.ll_nlabels); j++)
fprintf(fp, "\\%03o", d->d_first[j] & 0xff);
fprintf(fp, "\"},\n");
}
fprintf(fp, "};\n");
}
static void
printlabels(grammar *g, FILE *fp)
{
label *l;
int i;
fprintf(fp, "static label labels[%d] = {\n", g->g_ll.ll_nlabels);
l = g->g_ll.ll_label;
for (i = g->g_ll.ll_nlabels; --i >= 0; l++) {
if (l->lb_str == NULL)
fprintf(fp, "\t{%d, 0},\n", l->lb_type);
else
fprintf(fp, "\t{%d, \"%s\"},\n",
l->lb_type, l->lb_str);
}
fprintf(fp, "};\n");
}