/**

 * @file print.c

 * @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#include <stdarg.h>

#include <stdio.h>

#include <syslog.h>

#include <time.h>

#include <unistd.h>

#include "print.h"

static int verbose = 0;

static int print_level = LOG_INFO;

static int use_syslog = 1;

static const char *progname;

static const char *message_tag;

void print_set_progname(const char *name)

{

	progname = name;

}

void print_set_tag(const char *tag)

{

	message_tag = tag;

}

void print_set_syslog(int value)

{

	use_syslog = value ? 1 : 0;

}

void print_set_level(int level)

{

	print_level = level;

}

void print_set_verbose(int value)

{

	verbose = value ? 1 : 0;

}

void print(int level, char const *format, ...)

{

	struct timespec ts;

	va_list ap;

	char buf[1024];

	FILE *f;

	if (level > print_level)

		return;

	clock_gettime(CLOCK_MONOTONIC, &ts);

	va_start(ap, format);

	vsnprintf(buf, sizeof(buf), format, ap);

	va_end(ap);

	if (verbose) {

		f = level >= LOG_NOTICE ? stdout : stderr;

		fprintf(f, "%s[%ld.%03ld]: %s%s%s\n",

			progname ? progname : "",

			ts.tv_sec, ts.tv_nsec / 1000000,

			message_tag ? message_tag : "", message_tag ? " " : "",

			buf);

		fflush(f);

	}

	if (use_syslog) {

		syslog(level, "[%ld.%03ld] %s%s%s",

		       ts.tv_sec, ts.tv_nsec / 1000000,

		       message_tag ? message_tag : "", message_tag ? " " : "",

		       buf);

	}

}