/*
 * Copyright (c) 1997,1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "$Id: assertions.c,v 8.4 2001/05/29 05:49:22 marka Exp $";
#endif

#include "port_before.h"

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <isc/assertions.h>

#include "port_after.h"

/*
 * Forward.
 */

static void default_assertion_failed(const char *, int, assertion_type,
				     const char *, int);

/*
 * Public.
 */

assertion_failure_callback __assertion_failed = default_assertion_failed;

void
set_assertion_failure_callback(assertion_failure_callback f) {
	if (f == NULL)
		__assertion_failed = default_assertion_failed;
	else
		__assertion_failed = f;
}

const char *
assertion_type_to_text(assertion_type type) {
	const char *result;

	switch (type) {
	case assert_require:
		result = "REQUIRE";
		break;
	case assert_ensure:
		result = "ENSURE";
		break;
	case assert_insist:
		result = "INSIST";
		break;
	case assert_invariant:
		result = "INVARIANT";
		break;
	default:
		result = NULL;
	}
	return (result);
}

/*
 * Private.
 */

static void
default_assertion_failed(const char *file, int line, assertion_type type,
			 const char *cond, int print_errno)
{
	fprintf(stderr, "%s:%d: %s(%s)%s%s failed.\n",
		file, line, assertion_type_to_text(type), cond,
		(print_errno) ? ": " : "",
		(print_errno) ? strerror(errno) : "");
	abort();
	/* NOTREACHED */
}