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69 lines
2.1 KiB
69 lines
2.1 KiB
/*
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* Copyright (c) 2010-2017 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "math.h"
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#include <random>
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#ifdef _MSC_VER
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#pragma warning(disable:4267) // '?' : conversion from 'A' to 'B', possible loss of data
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#endif
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namespace stdext {
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uint32_t adler32(const uint8_t *buffer, size_t size) {
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size_t a = 1, b = 0, tlen;
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while(size > 0) {
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tlen = size > 5552 ? 5552 : size;
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size -= tlen;
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do {
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a += *buffer++;
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b += a;
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} while (--tlen);
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a %= 65521;
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b %= 65521;
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}
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return (b << 16) | a;
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}
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long random_range(long min, long max)
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{
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static std::random_device rd;
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static std::mt19937 gen(rd());
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static std::uniform_int_distribution<long> dis(0, 2147483647);
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return min + (dis(gen) % (max - min + 1));
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}
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float random_range(float min, float max)
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{
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static std::random_device rd;
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static std::mt19937 gen(rd());
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static std::uniform_real_distribution<float> dis(0.0, 1.0);
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return min + (max - min)*dis(gen);
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}
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double round(double r)
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{
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return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
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}
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} |