runjam/util.cpp at master · idthic/runjam · GitHub

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/* This file is a part of runjam <https://github.com/idthic/runjam>.

 Copyright (C) 2014-2020, Koichi Murase <myoga.murase at gmail.com>

 SPDX-License-Identifier: GPL-2.0-or-later

 This program 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 2 of the
 License, or any later version.

 This program 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 this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 USA */

#include"util.hpp"
#include<cstddef>
#include<cstring>
#include<random>
#include<string>

#include<cstdarg>

namespaceidt::util {

boolends_with(constchar* s, std::size_t l, constchar* suffix, std::size_t len) {
return l >= len && std::memcmp(s + (l - len), suffix, len) == 0;
}
boolends_with(std::string const& s, std::string const& suffix) {
returnends_with(s.c_str(), s.size(), suffix.c_str(), suffix.size());
}
boolends_with(std::string const& s, constchar* suffix) {
returnends_with(s.c_str(), s.size(), suffix, std::strlen(suffix));
}
boolends_with(constchar* s, constchar* suffix) {
returnends_with(s, std::strlen(s), suffix, std::strlen(suffix));
}

//-----------------------------------------------------------------------------
// taken from fitmass/common.cpp

std::string vstrprintf(constchar* fmt, std::va_list va) {
 std::va_list va1;
va_copy(va1, va);
 std::size_tconst sz = vsnprintf(NULL, 0, fmt, va1);
va_end(va1);

char* buff = (char*) std::malloc(sz + 1);
va_copy(va1, va);
std::vsprintf(buff, fmt, va1);
va_end(va1);

 std::string str = buff;
std::free(buff);
return str;
}

std::string strprintf(constchar* fmt, ...) {
 std::va_list va;
va_start(va, fmt);
 std::string const str = vstrprintf(fmt, va);
va_end(va);
return str;
}

std::string strprintf(std::string const& fmt, ...) {
 std::va_list va;
va_start(va, fmt);
 std::string const str = vstrprintf(fmt.c_str(), va);
va_end(va);
return str;
}

//-----------------------------------------------------------------------------

static std::mt19937 eng;

std::mt19937& random_engine() {
return eng;
}

voidset_random_seed(int seed) {
 eng.seed(seed);
}

doubleurand() {
static std::uniform_real_distribution<double> dist(0.0, 1.0);
returndist(eng);
}

doublenrand() {
static std::normal_distribution<double> dist;
returndist(eng);
}

intirand(int n) {
 std::uniform_int_distribution<int> dist(0, n - 1);
returndist(eng);
}
std::size_tirand(std::size_t n) {
 std::uniform_int_distribution<std::size_t> dist(0, n - 1);
returndist(eng);
}

intirand_poisson(double lambda){
if (lambda == 0.0) return0;
 std::poisson_distribution<int> dist(lambda);
returndist(eng);
}

intirand_binomial(int trial, double probability) {
 std::binomial_distribution<int> dist(trial, probability);
returndist(eng);
}
std::size_tirand_binomial(std::size_t trial, double probability) {
 std::binomial_distribution<std::size_t> dist(trial, probability);
returndist(eng);
}

}