mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-16 13:21:50 -05:00
150 lines
3.6 KiB
C++
150 lines
3.6 KiB
C++
/*
|
|
|
|
This file is a part of JRTPLIB
|
|
Copyright (c) 1999-2017 Jori Liesenborgs
|
|
|
|
Contact: jori.liesenborgs@gmail.com
|
|
|
|
This library was developed at the Expertise Centre for Digital Media
|
|
(http://www.edm.uhasselt.be), a research center of the Hasselt University
|
|
(http://www.uhasselt.be). The library is based upon work done for
|
|
my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
|
copy of this software and associated documentation files (the "Software"),
|
|
to deal in the Software without restriction, including without limitation
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
|
Software is furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included
|
|
in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
IN THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
#include "rtprandomurandom.h"
|
|
#include "rtperrors.h"
|
|
#include <Qt>
|
|
#include <cstdio>
|
|
|
|
namespace qrtplib
|
|
{
|
|
|
|
RTPRandomURandom::RTPRandomURandom()
|
|
{
|
|
device = 0;
|
|
}
|
|
|
|
RTPRandomURandom::~RTPRandomURandom()
|
|
{
|
|
if (device) {
|
|
fclose(device);
|
|
}
|
|
}
|
|
|
|
int RTPRandomURandom::Init()
|
|
{
|
|
if (device) {
|
|
return ERR_RTP_RTPRANDOMURANDOM_ALREADYOPEN;
|
|
}
|
|
|
|
device = fopen("/dev/urandom", "rb");
|
|
|
|
if (device == 0) {
|
|
return ERR_RTP_RTPRANDOMURANDOM_CANTOPEN;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint8_t RTPRandomURandom::GetRandom8()
|
|
{
|
|
if (!device)
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom8: no device");
|
|
return 0;
|
|
}
|
|
|
|
uint8_t value;
|
|
|
|
if (fread(&value, 1, sizeof(uint8_t), device) != sizeof(uint8_t))
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom8: cannot read unsigned 8 bit value from device");
|
|
return 0;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
uint16_t RTPRandomURandom::GetRandom16()
|
|
{
|
|
if (!device)
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom16: no device");
|
|
return 0;
|
|
}
|
|
|
|
uint16_t value;
|
|
|
|
if (fread(&value, 1, sizeof(uint16_t), device) != sizeof(uint16_t))
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom16: cannot read unsigned 16 bit value from device");
|
|
return 0;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
uint32_t RTPRandomURandom::GetRandom32()
|
|
{
|
|
if (!device)
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom32: no device");
|
|
return 0;
|
|
}
|
|
|
|
uint32_t value;
|
|
|
|
if (fread(&value, 1, sizeof(uint32_t), device) != sizeof(uint32_t))
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandom32: cannot read unsigned 32 bit value from device");
|
|
return 0;
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
double RTPRandomURandom::GetRandomDouble()
|
|
{
|
|
if (!device)
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandomDouble: no device");
|
|
return 0;
|
|
}
|
|
|
|
uint64_t value;
|
|
|
|
if (fread(&value, 1, sizeof(uint64_t), device) != sizeof(uint64_t))
|
|
{
|
|
qWarning("RTPRandomURandom::GetRandomDouble: cannot read unsigned 64 bit value from device");
|
|
return 0;
|
|
}
|
|
|
|
value &= 0x7fffffffffffffffULL;
|
|
int64_t value2 = (int64_t) value;
|
|
double x = RTPRANDOM_2POWMIN63 * (double) value2;
|
|
|
|
return x;
|
|
}
|
|
|
|
} // end namespace
|
|
|