/******************************************************************************
 * The MIT License
 *
 * Copyright (c) 2015 Bryan Newbold
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, 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:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *****************************************************************************/

/*
 * Arduino-compatible digital math implementation.
 *
 * This replaces the old copyleft wirish_math implementation of randomSeed(),
 * and random().
 *
 * This file is a "clean" implementation using only the API documentation
 * without directly copying from the Arduino source. It simply wraps routines
 * provided in stdlib.
 */

#include <stdlib.h>
#include <wirish/wirish_math.h>

void randomSeed(unsigned int seed) {
    if (seed != 0) {
        srand(seed);
    }
}

long random(long max) {
    if (max <= 0) {
        max = 1;
    }
    return map(rand(), 0, RAND_MAX, 0, max-1);
}

long random(long min, long max) {
    if (max <= min) {
        max = min + 1;
    }
    return map(rand(), 0, RAND_MAX, min, max-1);
}