mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-26 17:58:43 -05:00
111 lines
2.9 KiB
C++
111 lines
2.9 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 "rtprandomrand48.h"
|
|
|
|
namespace qrtplib
|
|
{
|
|
|
|
RTPRandomRand48::RTPRandomRand48()
|
|
{
|
|
SetSeed(PickSeed());
|
|
}
|
|
|
|
RTPRandomRand48::RTPRandomRand48(uint32_t seed)
|
|
{
|
|
SetSeed(seed);
|
|
}
|
|
|
|
RTPRandomRand48::~RTPRandomRand48()
|
|
{
|
|
}
|
|
|
|
void RTPRandomRand48::SetSeed(uint32_t seed)
|
|
{
|
|
|
|
#ifdef RTP_HAVE_VSUINT64SUFFIX
|
|
state = ((uint64_t)seed) << 16 | 0x330Eui64;
|
|
#else
|
|
state = ((uint64_t) seed) << 16 | 0x330EULL;
|
|
#endif // RTP_HAVE_VSUINT64SUFFIX
|
|
}
|
|
|
|
uint8_t RTPRandomRand48::GetRandom8()
|
|
{
|
|
uint32_t x = ((GetRandom32() >> 24) & 0xff);
|
|
|
|
return (uint8_t) x;
|
|
}
|
|
|
|
uint16_t RTPRandomRand48::GetRandom16()
|
|
{
|
|
uint32_t x = ((GetRandom32() >> 16) & 0xffff);
|
|
|
|
return (uint16_t) x;
|
|
}
|
|
|
|
uint32_t RTPRandomRand48::GetRandom32()
|
|
{
|
|
|
|
#ifdef RTP_HAVE_VSUINT64SUFFIX
|
|
state = ((0x5DEECE66Dui64*state) + 0xBui64)&0x0000ffffffffffffui64;
|
|
|
|
uint32_t x = (uint32_t)((state>>16)&0xffffffffui64);
|
|
#else
|
|
state = ((0x5DEECE66DULL * state) + 0xBULL) & 0x0000ffffffffffffULL;
|
|
|
|
uint32_t x = (uint32_t) ((state >> 16) & 0xffffffffULL);
|
|
#endif // RTP_HAVE_VSUINT64SUFFIX
|
|
|
|
return x;
|
|
}
|
|
|
|
double RTPRandomRand48::GetRandomDouble()
|
|
{
|
|
|
|
#ifdef RTP_HAVE_VSUINT64SUFFIX
|
|
state = ((0x5DEECE66Dui64*state) + 0xBui64)&0x0000ffffffffffffui64;
|
|
|
|
int64_t x = (int64_t)state;
|
|
#else
|
|
state = ((0x5DEECE66DULL * state) + 0xBULL) & 0x0000ffffffffffffULL;
|
|
|
|
int64_t x = (int64_t) state;
|
|
#endif // RTP_HAVE_VSUINT64SUFFIX
|
|
|
|
double y = 3.552713678800500929355621337890625e-15 * (double) x;
|
|
return y;
|
|
}
|
|
|
|
} // end namespace
|
|
|