SaraP
152 lines
4.1 KiB
C++
152 lines
4.1 KiB
C++
/*++
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Copyright (C) 2019 3MF Consortium
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Abstract:
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NMR_UUID.cpp implements a datatype and functions to handle UUIDs
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--*/
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#include "Common/NMR_UUID.h"
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#include "Common/NMR_StringUtils.h"
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#include "Common/NMR_Exception.h"
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#include <algorithm>
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#ifdef _WIN32
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#include <objbase.h>
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#include <iomanip>
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#else
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#include <ctime>
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#endif
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namespace NMR
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{
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#ifndef _WIN32
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bool CUUID::S_mtwister_initialised = false;
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std::mutex CUUID::S_uuid_gen_mutex;
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std::random_device CUUID::S_rand_dev;
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std::mt19937 CUUID::S_mtwister;
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#endif
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CUUID::CUUID()
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{
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#ifdef _WIN32
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GUID guid;
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if (CoCreateGuid(&guid) != S_OK)
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throw CNMRException(NMR_ERROR_UUIDGENERATIONFAILED);
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LPOLESTR str;
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if (StringFromCLSID(guid, &str) != S_OK)
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throw CNMRException(NMR_ERROR_UUIDGENERATIONFAILED);
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set(fnUTF16toUTF8(str).c_str());
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#else
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std::lock_guard<std::mutex> l_lock(S_uuid_gen_mutex);
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if (!S_mtwister_initialised)
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{
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// Prepare seed data
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uint32_t l_seed_data[std::mt19937::state_size];
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uint32_t l_cur_time = static_cast<uint32_t>(time(nullptr));
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for (size_t i = 0; i < std::mt19937::state_size; ++i)
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{
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l_seed_data[i] = S_rand_dev() ^ l_cur_time;
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}
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// Init Mersenne Twister pseudo-random generator
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std::seed_seq l_seed_seq(std::begin(l_seed_data), std::end(l_seed_data));
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S_mtwister.seed(l_seed_seq);
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S_mtwister_initialised = true;
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}
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// generation of a v4 UUID according to https://tools.ietf.org/html/rfc4122#section-4.4
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std::uniform_int_distribution<std::mt19937::result_type> distHexaDec(0, 15);
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std::uniform_int_distribution<std::mt19937::result_type> dist4(0, 4);
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const nfChar* hexaDec = "0123456789abcdef";
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nfChar string[33];
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for (int i = 0; i < 32; i++)
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string[i] = hexaDec[distHexaDec(S_mtwister)];
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string[12] = hexaDec[4]; // set version 4
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string[16] = hexaDec[8 + dist4(S_mtwister)];
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string[32] = 0;
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set(string);
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#endif
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}
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CUUID::CUUID(const nfChar* pString)
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{
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set(pString);
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}
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CUUID::CUUID(const std::string &string)
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{
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set(string.c_str());
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}
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std::string CUUID::toString() const
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{
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return m_sUUID;
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}
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bool InValid(char c)
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{
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return !(((c >= '0') && (c <= '9'))
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|| ((c >= 'a') && (c <= 'f'))
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// || (c == '-')
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);
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}
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bool CUUID::set(const nfChar* pString)
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{
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// to lowercase, remove all non hex characters, insert dashes again
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std::string str = pString;
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std::transform(str.begin(), str.end(), str.begin(), ::tolower);
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str.erase(std::remove_if(str.begin(), str.end(), &InValid), str.end());
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if (str.length() != 32) {
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throw CNMRException(NMR_ERROR_ILLFORMATUUID);
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}
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m_sUUID = str.substr(0, 8) + '-' + str.substr(8, 4) + '-' + str.substr(12, 4) + '-' + str.substr(16, 4) + '-' + str.substr(20, 12);
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return true;
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}
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CUUID& CUUID::operator=(const CUUID& uuid)
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{
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if (&uuid == this)
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return *this;
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m_sUUID = uuid.m_sUUID;
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return *this;
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}
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bool CUUID::operator==(const CUUID& uuid)
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{
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if (&uuid == this)
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return true;
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return m_sUUID == uuid.m_sUUID;
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}
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}
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