/*
 * Copyright (C) 1998, 1999, 2000  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.
 */

#include <config.h>

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

#include <isc/error.h>

static void
default_unexpected_callback(char *, int, char *, va_list);

static void
default_fatal_callback(char *, int, char *, va_list);

static isc_errorcallback_t unexpected_callback = default_unexpected_callback;
static isc_errorcallback_t fatal_callback = default_fatal_callback;

void
isc_error_setunexpected(isc_errorcallback_t cb) {
	if (cb == NULL)
		unexpected_callback = default_unexpected_callback;
	else
		unexpected_callback = cb;
}

void
isc_error_setfatal(isc_errorcallback_t cb) {
	if (cb == NULL)
		fatal_callback = default_fatal_callback;
	else
		fatal_callback = cb;
}

void
isc_error_unexpected(char *file, int line, char *format, ...) {
	va_list args;

	va_start(args, format);
	(unexpected_callback)(file, line, format, args);
	va_end(args);
}

void
isc_error_fatal(char *file, int line, char *format, ...) {
	va_list args;

	va_start(args, format);
	(fatal_callback)(file, line, format, args);
	va_end(args);
	abort();
}

void
isc_error_runtimecheck(char *file, int line, char *expression) {
	isc_error_fatal(file, line, "RUNTIME_CHECK(%s) failed", expression);
}

static void
default_unexpected_callback(char *file, int line, char *format, va_list args) {
	fprintf(stderr, "%s:%d: ", file, line);
	vfprintf(stderr, format, args);
	fprintf(stderr, "\n");
	fflush(stderr);
}

static void
default_fatal_callback(char *file, int line, char *format, va_list args) {
	fprintf(stderr, "%s:%d: fatal error: ", file, line);
	vfprintf(stderr, format, args);
	fprintf(stderr, "\n");
	fflush(stderr);
}