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replace rand() -> MT19937 random number generator

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sometimes rand() makes problem so replace it to MT19937 in C++11 <random>.
This commit is contained in:
SASANO Takayoshi
2020-07-02 06:40:26 +09:00
parent 0892aaaaae
commit dfaedb450b
4 changed files with 22 additions and 11 deletions
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11
DStarNetwork.cpp
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@@ -44,14 +44,16 @@ m_inId(0U),
m_buffer(1000U, "D-Star Network"),
m_pollTimer(1000U, 60U),
m_linkStatus(LS_NONE),
m_linkReflector(NULL)
m_linkReflector(NULL),
m_random()
{
m_address = CUDPSocket::lookup(gatewayAddress);
m_linkReflector = new unsigned char[DSTAR_LONG_CALLSIGN_LENGTH];
CStopWatch stopWatch;
::srand(stopWatch.start());
std::random_device rd;
std::mt19937 mt(rd());
m_random = mt;
}
CDStarNetwork::~CDStarNetwork()
@@ -85,7 +87,8 @@ bool CDStarNetwork::writeHeader(const unsigned char* header, unsigned int length
buffer[4] = busy ? 0x22U : 0x20U;
// Create a random id for this transmission
m_outId = (::rand() % 65535U) + 1U;
std::uniform_int_distribution<uint16_t> dist(0x0001, 0xfffe);
m_outId = dist(m_random);
buffer[5] = m_outId / 256U; // Unique session id
buffer[6] = m_outId % 256U;