cpython/Parser/printgrammar.c

/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
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permission.

While CWI is the initial source for this software, a modified version
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(CNRI) at the Internet address ftp://ftp.python.org.

STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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******************************************************************/

/* Print a bunch of C initializers that represent a grammar */

#include "pgenheaders.h"
#include "grammar.h"

/* Forward */
static void printarcs PROTO((int, dfa *, FILE *));
static void printstates PROTO((grammar *, FILE *));
static void printdfas PROTO((grammar *, FILE *));
static void printlabels PROTO((grammar *, FILE *));

void
printgrammar(g, fp)
	grammar *g;
	FILE *fp;
{
	fprintf(fp, "#include \"pgenheaders.h\"\n");
	fprintf(fp, "#include \"grammar.h\"\n");
	printdfas(g, fp);
	printlabels(g, fp);
	fprintf(fp, "grammar gram = {\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(g, fp)
	grammar *g;
	FILE *fp;
{
	dfa *d;
	int i;
	
	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(i, d, fp)
	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(g, fp)
	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(g, fp)
	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(g, fp)
	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");
}