nullgen.c

/*
 * nullgen.c - NULL sink generation
 *
 * (C) Copyright Pantelis Antoniou <pantelis.antoniou@konsulko.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     (1) Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *     (2) Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *     (3)The name of the author may not be used to
 *     endorse or promote products derived from this software without
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include "config.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <time.h>
#include <stdbool.h>
#include <assert.h>
#include <alloca.h>
#include <limits.h>

#include "utils.h"
#include "syexpr.h"
#include "base64.h"

#include "dt.h"

#include "nullgen.h"

static struct ref *null_ref_alloc(struct tree *t, enum ref_type type,
				 const void *data, int len, const char *xtag)
{
	return yaml_dt_ref_alloc(t, type, data, len, xtag,
			sizeof(struct dt_ref));
}

static void null_ref_free(struct tree *t, struct ref *ref)
{
	yaml_dt_ref_free(t, ref);
}

static struct property *null_prop_alloc(struct tree *t, const char *name)
{
	return yaml_dt_prop_alloc(t, name, sizeof(struct dt_property));
}

static void null_prop_free(struct tree *t, struct property *prop)
{
	yaml_dt_prop_free(t, prop);
}

static struct label *null_label_alloc(struct tree *t, const char *name)
{
	return yaml_dt_label_alloc(t, name, sizeof(struct dt_label));
}

static void null_label_free(struct tree *t, struct label *l)
{
	yaml_dt_label_free(t, l);
}

static struct node *null_node_alloc(struct tree *t, const char *name,
				   const char *label)
{
	return yaml_dt_node_alloc(t, name, label, sizeof(struct dt_node));
}

static void null_node_free(struct tree *t, struct node *np)
{
	yaml_dt_node_free(t, np);
}

static const struct tree_ops null_tree_ops = {
	.ref_alloc		= null_ref_alloc,
	.ref_free		= null_ref_free,
	.prop_alloc		= null_prop_alloc,
	.prop_free		= null_prop_free,
	.label_alloc		= null_label_alloc,
	.label_free		= null_label_free,
	.node_alloc		= null_node_alloc,
	.node_free		= null_node_free,
	.debugf			= yaml_dt_tree_debugf,
	.msg_at_node		= yaml_dt_tree_msg_at_node,
	.msg_at_property	= yaml_dt_tree_msg_at_property,
	.msg_at_ref		= yaml_dt_tree_msg_at_ref,
	.msg_at_label		= yaml_dt_tree_msg_at_label,
};

int null_setup(struct yaml_dt_state *dt)
{
	return 0;
}

void null_cleanup(struct yaml_dt_state *dt)
{
}

int null_emit(struct yaml_dt_state *dt)
{
	return 0;
}

static const struct yaml_dt_emitter_ops null_emitter_ops = {
	.setup		= null_setup,
	.cleanup	= null_cleanup,
	.emit		= null_emit,
};

static const char *null_suffixes[] = {
	NULL
};

struct yaml_dt_emitter null_emitter = {
	.name		= "null",
	.tops		= &null_tree_ops,
	.suffixes	= null_suffixes,
	.eops		= &null_emitter_ops,
};