tibia-client/src/framework/stdext/math.cpp

60 lines
2.0 KiB
C++

/*
* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
*
* 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.
*/
#include "math.h"
#include <random>
namespace stdext {
uint32_t adler32(const uint8_t *buffer, size_t size) {
register size_t a = 1, b = 0, tlen;
while(size > 0) {
tlen = size > 5552 ? 5552 : size;
size -= tlen;
do {
a += *buffer++;
b += a;
} while (--tlen);
a %= 65521;
b %= 65521;
}
return (b << 16) | a;
}
long random_range(long min, long max)
{
static std::random_device rd;
static std::mt19937 gen(rd());
static std::uniform_int_distribution<long> dis(0, 2147483647);
return min + (dis(gen) % (max - min + 1));
}
float random_range(float min, float max)
{
static std::random_device rd;
static std::mt19937 gen(rd());
static std::uniform_real_distribution<float> dis(0.0, 1.0);
return min + (max - min)*dis(gen);
}
}