/*---------------------------------------------------------------
 * Copyright (c) 2023
 * Broadcom Corporation
 * All Rights Reserved.
 *---------------------------------------------------------------
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 * obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the
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 * sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 *
 * Redistributions of source code must retain the above
 * copyright notice, this list of conditions and
 * the following disclaimers.
 *
 *
 * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimers in the documentation and/or other materials
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 * nor the names of its contributors may be used to endorse
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 * ________________________________________________________________
 *
 * iperf_formattime
 * wrapper around strftime.c for iperf supported formatting
 *
 * by Robert J. McMahon (rjmcmahon@rjmcmahon.com, bob.mcmahon@broadcom.com)
 * -------------------------------------------------------------------
 */
#include "headers.h"
#include "util.h"
#include "iperf_formattime.h"

inline void iperf_formattime (char *timestr, int buflen, struct timeval timestamp, bool prec_ms, bool utc_time, enum TimeFormatType ftype) {
    struct tm ts ;
    ts = (utc_time ? *gmtime(&timestamp.tv_sec) : *localtime(&timestamp.tv_sec));
    switch (ftype) {
    case YearThruSec:
	strftime(timestr, buflen, "%Y-%m-%d %H:%M:%S", &ts);
	if (prec_ms) {
	    int currlen = strlen(timestr);
	    if (currlen > 5) {
		snprintf((timestr + currlen), 5, ".%.3d", (int) (timestamp.tv_usec/1000));
	    }
	}
	break;
    case YearThruSecTZ:
	strftime(timestr, buflen, "%Y-%m-%d %H:%M:%S", &ts);
        int currlen = strlen(timestr);
	if (prec_ms) {
	    if (currlen > 5) {
		snprintf((timestr + currlen), 5, ".%.3d", (int) (timestamp.tv_usec/1000));
		currlen = strlen(timestr);
	    }
	}
	if ((buflen - currlen) > 5) {
	    strftime((timestr + currlen), (buflen - currlen), " (%Z)", &ts);
	}
	break;
    case CSV:
	strftime(timestr, buflen, "%Y%m%d%H%M%S", &ts);
	if (prec_ms) {
	    int currlen = strlen(timestr);
	    if (currlen > 5) {
		snprintf((timestr + currlen), 5, ".%.3d", (int) (timestamp.tv_usec/1000));
	    }
	}
	break;
    case CSVTZ:
	strftime(timestr, buflen, "%z:%Y%m%d%H%M%S", &ts);
	if (prec_ms) {
	    int currlen = strlen(timestr);
	    if (currlen > 5) {
		snprintf((timestr + currlen), 5, ".%.3d", (int) (timestamp.tv_usec/1000));
	    }
	}
	break;
    default:
	FAIL_exit(1, "iperf_formattime program error");
    }
    timestr[buflen - 1] = '\0'; // make sure string is null terminated
}