mirror of
https://github.com/monero-project/monero.git
synced 2024-12-27 14:09:31 +00:00
62 lines
2.8 KiB
C++
62 lines
2.8 KiB
C++
// Copyright (c) 2018, The Monero Project
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other
|
|
// materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without specific
|
|
// prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
#pragma once
|
|
|
|
#include <vector>
|
|
#include "misc_log_ex.h"
|
|
#include "span.h"
|
|
|
|
#undef MONERO_DEFAULT_LOG_CATEGORY
|
|
#define MONERO_DEFAULT_LOG_CATEGORY "net.buffer"
|
|
|
|
//#define NET_BUFFER_LOG(x) MDEBUG(x)
|
|
#define NET_BUFFER_LOG(x) ((void)0)
|
|
|
|
namespace epee
|
|
{
|
|
namespace net_utils
|
|
{
|
|
class buffer
|
|
{
|
|
public:
|
|
buffer(size_t reserve = 0): offset(0) { storage.reserve(reserve); }
|
|
|
|
void append(const void *data, size_t sz);
|
|
void erase(size_t sz) { NET_BUFFER_LOG("erasing " << sz << "/" << size()); CHECK_AND_ASSERT_THROW_MES(offset + sz <= storage.size(), "erase: sz too large"); offset += sz; if (offset == storage.size()) { storage.resize(0); offset = 0; } }
|
|
epee::span<const uint8_t> span(size_t sz) const { CHECK_AND_ASSERT_THROW_MES(sz <= size(), "span is too large"); return epee::span<const uint8_t>(storage.data() + offset, sz); }
|
|
// carve must keep the data in scope till next call, other API calls (such as append, erase) can invalidate the carved buffer
|
|
epee::span<const uint8_t> carve(size_t sz) { CHECK_AND_ASSERT_THROW_MES(sz <= size(), "span is too large"); offset += sz; return epee::span<const uint8_t>(storage.data() + offset - sz, sz); }
|
|
size_t size() const { return storage.size() - offset; }
|
|
|
|
private:
|
|
std::vector<uint8_t> storage;
|
|
size_t offset;
|
|
};
|
|
}
|
|
}
|