// Copyright(c) 2018-2020, Intel Corporation

//

// Redistribution  and  use  in source  and  binary  forms,  with  or  without

// modification, are permitted provided that the following conditions are met:

//

// * Redistributions of  source code  must retain the  above copyright notice,

//   this list of conditions and the following disclaimer.

// * 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.

// * Neither the name  of Intel Corporation  nor the names of its contributors

//   may be used to  endorse or promote  products derived  from this  software

//   without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER  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.

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif // HAVE_CONFIG_H

#include <time.h>

#include "logging.h"

#ifdef LOG

#undef LOG

#endif

#define LOG(format, ...) \

log_printf("logging: " format, ##__VA_ARGS__)

STATIC pthread_mutex_t log_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

STATIC FILE *log_file;

#define BUF_TIME_LEN    256

int log_open(const char *filename)

{

	int res;

	int err;

	fpgad_mutex_lock(err, &log_lock);

	log_file = fopen(filename, "a");

	if (log_file) {

		time_t raw;

		struct tm tm;

		char timebuf[BUF_TIME_LEN];

		size_t len;

		time(&raw;;

		localtime_r(&raw, &tm;;

		asctime_r(&tm, timebuf);

		len = strnlen(timebuf, sizeof(timebuf));

		if (len < BUF_TIME_LEN) {

			timebuf[len - 1] = '\0'; /* erase \n */

		} else {

			printf(" Invalid time stamp buffer size \n");

			fpgad_mutex_unlock(err, &log_lock);

			return -1;

		}

		res = fprintf(log_file, "----- %s -----\n", timebuf);

		fflush(log_file);

	} else {

		res = -1;

	}

	fpgad_mutex_unlock(err, &log_lock);

	return res;

}

int log_printf(const char *fmt, ...)

{

	va_list l;

	int res = -1;

	int err;

	va_start(l, fmt);

	fpgad_mutex_lock(err, &log_lock);

	if (log_file) {

		res = vfprintf(log_file, fmt, l);

		fflush(log_file);

	}

	fpgad_mutex_unlock(err, &log_lock);

	va_end(l);

	return res;

}

void log_set(FILE *fptr)

{

	int err;

	fpgad_mutex_lock(err, &log_lock);

	log_close();

	log_file = fptr;

	fpgad_mutex_unlock(err, &log_lock);

}

void log_close(void)

{

	int err;

	fpgad_mutex_lock(err, &log_lock);

	if (log_file) {

		if (log_file != stdout &&

		    log_file != stderr) {

			fclose(log_file);

		}

		log_file = NULL;

	}

	fpgad_mutex_unlock(err, &log_lock);

}