/*
 * Utilities.
 */

/*
 * Copyright © 2016-2018 The TokTok team.
 * Copyright © 2013 Tox project.
 * Copyright © 2013 plutooo
 *
 * This file is part of Tox, the free peer to peer instant messenger.
 * This file is donated to the Tox Project.
 *
 * Tox 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 3 of the License, or
 * (at your option) any later version.
 *
 * Tox 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 Tox.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifndef _XOPEN_SOURCE
#define _XOPEN_SOURCE 600
#endif

#include "util.h"

#include "crypto_core.h" /* for CRYPTO_PUBLIC_KEY_SIZE */

#include <stdlib.h>
#include <string.h>
#include <time.h>


/* id functions */
bool id_equal(const uint8_t *dest, const uint8_t *src)
{
    return public_key_cmp(dest, src) == 0;
}

uint32_t id_copy(uint8_t *dest, const uint8_t *src)
{
    memcpy(dest, src, CRYPTO_PUBLIC_KEY_SIZE);
    return CRYPTO_PUBLIC_KEY_SIZE;
}

void host_to_net(uint8_t *num, uint16_t numbytes)
{
#ifndef WORDS_BIGENDIAN
    uint32_t i;
    VLA(uint8_t, buff, numbytes);

    for (i = 0; i < numbytes; ++i) {
        buff[i] = num[numbytes - i - 1];
    }

    memcpy(num, buff, numbytes);
#endif
}

void net_to_host(uint8_t *num, uint16_t numbytes)
{
    host_to_net(num, numbytes);
}

int create_recursive_mutex(pthread_mutex_t *mutex)
{
    pthread_mutexattr_t attr;

    if (pthread_mutexattr_init(&attr) != 0) {
        return -1;
    }

    if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0) {
        pthread_mutexattr_destroy(&attr);
        return -1;
    }

    /* Create queue mutex */
    if (pthread_mutex_init(mutex, &attr) != 0) {
        pthread_mutexattr_destroy(&attr);
        return -1;
    }

    pthread_mutexattr_destroy(&attr);

    return 0;
}

int16_t max_s16(int16_t a, int16_t b)
{
    return a > b ? a : b;
}
int32_t max_s32(int32_t a, int32_t b)
{
    return a > b ? a : b;
}
int64_t max_s64(int64_t a, int64_t b)
{
    return a > b ? a : b;
}

int16_t min_s16(int16_t a, int16_t b)
{
    return a < b ? a : b;
}
int32_t min_s32(int32_t a, int32_t b)
{
    return a < b ? a : b;
}
int64_t min_s64(int64_t a, int64_t b)
{
    return a < b ? a : b;
}

uint16_t max_u16(uint16_t a, uint16_t b)
{
    return a > b ? a : b;
}
uint32_t max_u32(uint32_t a, uint32_t b)
{
    return a > b ? a : b;
}
uint64_t max_u64(uint64_t a, uint64_t b)
{
    return a > b ? a : b;
}

uint16_t min_u16(uint16_t a, uint16_t b)
{
    return a < b ? a : b;
}
uint32_t min_u32(uint32_t a, uint32_t b)
{
    return a < b ? a : b;
}
uint64_t min_u64(uint64_t a, uint64_t b)
{
    return a < b ? a : b;
}