/* * 
 * This file is part of bufferpool
 *
 * Copyright (C) 2007 by LScube team <team@streaming.polito.it>
 * See AUTHORS for more details
 * 
 * bufferpool is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * bufferpool 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with bufferpool; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 
 *
 * */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#if ENABLE_DUMPBUFF

#include <time.h>

#include <bufferpool.h>

#define LOG_FORMAT "%d/%b/%Y:%H:%M:%S %z"
#define MAX_LEN_DATE 30

/* @brief Dump of bufferpool.
 * This function print the current status of bufferpool. This is useful only for debugging, so if ENABLE_DEBUG
 * is not defined it will be #defined to nothing.
 * The function takes two parameters that are mutual exclusive each other: If you are a consumer you should use
 * the <tt>cons</tt> parameter, while if you're the writer you should use <tt>buffer</tt> parameter.
 * If both are not NULL the first will be used.
 * */
void bp_dump(BPConsumer * cons, BPBuffer * buffer)
{
    static FILE *dump_file = NULL;
    int i;
#define WR 0            // write_pos
#define RD 1            // read_pos
#define LR 2            // last_read_pos
    char pointers[4] = "   ";

    buffer = cons ? cons->buffer : buffer;

    if (!buffer)
        return;

    if (!dump_file) {
        char date[MAX_LEN_DATE];
        time_t now;
        const struct tm *tm;

        if (!(dump_file = fopen("bp.dump", "a")))
            return;

        time(&now);
        tm = localtime(&now);
        strftime(date, MAX_LEN_DATE, LOG_FORMAT, tm);

        fprintf(dump_file, "[%s] [new dump]\n ", date);
    }

    fprintf(dump_file, "********* BUFFERPOOL DUMP *********\n");
    fprintf(dump_file, "Buffer\n");
    fprintf(dump_file, " refs:            %u\n", buffer->control->refs);
    fprintf(dump_file, " number of slots: %u\n", buffer->control->nslots);
    fprintf(dump_file, " known slots:     %u\n", buffer->known_slots);
    if (cons) {
        fprintf(dump_file, "Consumer\n");
        fprintf(dump_file, " last_seq:            %llu\n",
            cons->last_seq);
        fprintf(dump_file, " first_rtptime:             %3.2f\n",
            cons->first_rtptime);
        fprintf(dump_file, " frames:              %d\n", cons->frames);
    }
    for (i = 0; i < buffer->known_slots; i++) {
        pointers[WR] =
            (buffer->control->write_pos == (BPSlotPtr) i) ? 'W' : ' ';
        pointers[RD] = (cons
                && (cons->read_pos ==
                    (BPSlotPtr) i)) ? 'R' : ' ';
        pointers[LR] = (cons
                && (cons->last_read_pos ==
                    (BPSlotPtr) i)) ? 'L' : ' ';
        fprintf(dump_file,
            "refs: %u\tseq: %llu   \ttime: %3.2f\tslot: %u   \tnext: %d  \t%s\n",
            buffer->slots[i].refs, buffer->slots[i].slot_seq,
            buffer->slots[i].timestamp, i, buffer->slots[i].next,
            pointers);
    }
    fprintf(dump_file, "--------- BUFFERPOOL DUMP ---------\n");
}

#endif