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clio/src/util/Batching.hpp
2024-03-01 15:58:18 +00:00

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1.8 KiB
C++

//------------------------------------------------------------------------------
/*
This file is part of clio: https://github.com/XRPLF/clio
Copyright (c) 2024, the clio developers.
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#pragma once
#include "util/Assert.hpp"
#include <cstddef>
#include <functional>
#include <iterator>
namespace util {
/**
* @brief Iterate over a container in batches
*
* @param container The container to iterate over
* @param batchSize The size of each batch
* @param fn The function to call for each batch
*/
void
forEachBatch(std::ranges::forward_range auto&& container, std::size_t batchSize, auto&& fn)
{
ASSERT(batchSize > 0, "Batch size must be greater than 0");
auto to = std::begin(container);
auto end = std::end(container);
while (to != end) {
auto from = to;
auto cnt = batchSize;
while (to != end and cnt > 0) {
++to;
--cnt;
}
std::invoke(fn, from, to);
}
}
} // namespace util