/* $NetBSD: prop_bool.c,v 1.24 2025/05/14 03:25:45 thorpej Exp $ */
/*-
* Copyright (c) 2006, 2025 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 "prop_object_impl.h"
#include <prop/prop_bool.h>
struct _prop_bool {
struct _prop_object pb_obj;
bool pb_value;
};
static struct _prop_bool _prop_bool_true;
static struct _prop_bool _prop_bool_false;
static const char truestr[] = "true";
static const char falsestr[] = "false";
static const struct _prop_object_type_tags _prop_bool_true_type_tags = {
.xml_tag = truestr,
.json_open_tag = truestr,
};
static const struct _prop_object_type_tags _prop_bool_false_type_tags = {
.xml_tag = falsestr,
.json_open_tag = falsestr,
};
static _prop_object_free_rv_t
_prop_bool_free(prop_stack_t, prop_object_t *);
static bool _prop_bool_externalize(
struct _prop_object_externalize_context *,
void *);
static _prop_object_equals_rv_t
_prop_bool_equals(prop_object_t, prop_object_t,
void **, void **,
prop_object_t *, prop_object_t *);
static const struct _prop_object_type _prop_object_type_bool = {
.pot_type = PROP_TYPE_BOOL,
.pot_free = _prop_bool_free,
.pot_extern = _prop_bool_externalize,
.pot_equals = _prop_bool_equals,
};
#define prop_object_is_bool(x) \
((x) != NULL && (x)->pb_obj.po_type == &_prop_object_type_bool)
/* ARGSUSED */
static _prop_object_free_rv_t
_prop_bool_free(prop_stack_t stack, prop_object_t *obj)
{
/*
* This should never happen as we "leak" our initial reference
* count.
*/
/* XXX forced assertion failure? */
return (_PROP_OBJECT_FREE_DONE);
}
static bool
_prop_bool_externalize(struct _prop_object_externalize_context *ctx,
void *v)
{
prop_bool_t pb = v;
const struct _prop_object_type_tags *tags =
pb->pb_value ? &_prop_bool_true_type_tags
: &_prop_bool_false_type_tags;
return _prop_extern_append_empty_tag(ctx, tags);
}
/* ARGSUSED */
static _prop_object_equals_rv_t
_prop_bool_equals(prop_object_t v1, prop_object_t v2,
void **stored_pointer1, void **stored_pointer2,
prop_object_t *next_obj1, prop_object_t *next_obj2)
{
prop_bool_t b1 = v1;
prop_bool_t b2 = v2;
if (! (prop_object_is_bool(b1) &&
prop_object_is_bool(b2)))
return (_PROP_OBJECT_EQUALS_FALSE);
/*
* Since we only ever allocate one true and one false,
* save ourselves a couple of memory operations.
*/
if (b1 == b2)
return (_PROP_OBJECT_EQUALS_TRUE);
else
return (_PROP_OBJECT_EQUALS_FALSE);
}
_PROP_ONCE_DECL(_prop_bool_init_once)
static int
_prop_bool_init(void)
{
_prop_object_init(&_prop_bool_true.pb_obj,
&_prop_object_type_bool);
_prop_bool_true.pb_value = true;
_prop_object_init(&_prop_bool_false.pb_obj,
&_prop_object_type_bool);
_prop_bool_false.pb_value = false;
return 0;
}
static prop_bool_t
_prop_bool_alloc(bool val)
{
prop_bool_t pb;
_PROP_ONCE_RUN(_prop_bool_init_once, _prop_bool_init);
pb = val ? &_prop_bool_true : &_prop_bool_false;
prop_object_retain(pb);
return (pb);
}
/*
* prop_bool_create --
* Create a prop_bool_t and initialize it with the
* provided boolean value.
*/
_PROP_EXPORT prop_bool_t
prop_bool_create(bool val)
{
return (_prop_bool_alloc(val));
}
/*
* prop_bool_copy --
* Copy a prop_bool_t.
*/
_PROP_EXPORT prop_bool_t
prop_bool_copy(prop_bool_t opb)
{
if (! prop_object_is_bool(opb))
return (NULL);
/*
* Because we only ever allocate one true and one false, this
* can be reduced to a simple retain operation.
*/
prop_object_retain(opb);
return (opb);
}
/*
* prop_bool_value --
* Get the value of a prop_bool_t.
*/
_PROP_EXPORT bool
prop_bool_value(prop_bool_t pb)
{
if (! prop_object_is_bool(pb))
return (false);
return (pb->pb_value);
}
/*
* prop_bool_true --
* Historical alias for prop_bool_value().
*/
_PROP_EXPORT bool
prop_bool_true(prop_bool_t pb)
{
return prop_bool_value(pb);
}
/*
* prop_bool_equals --
* Return true if the boolean values are equivalent.
*/
_PROP_EXPORT bool
prop_bool_equals(prop_bool_t b1, prop_bool_t b2)
{
if (!prop_object_is_bool(b1) || !prop_object_is_bool(b2))
return (false);
return (prop_object_equals(b1, b2));
}
/*
* _prop_bool_internalize --
* Parse a <true/> or <false/> and return the object created from
* the external representation.
*/
/* ARGSUSED */
bool
_prop_bool_internalize(prop_stack_t stack, prop_object_t *obj,
struct _prop_object_internalize_context *ctx)
{
bool val;
/*
* N.B. For internalizing JSON, the layer above us has
* made it look like XML for this object type.
*/
/* No attributes, and it must be an empty element. */
if (ctx->poic_tagattr != NULL ||
ctx->poic_is_empty_element == false)
return (true);
if (_PROP_TAG_MATCH(ctx, truestr))
val = true;
else {
_PROP_ASSERT(_PROP_TAG_MATCH(ctx, falsestr));
val = false;
}
*obj = prop_bool_create(val);
return (true);
}
