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4.11.5
Developer docs for <a href="https://github.com/f4exb/sdrangel">SDRangel<\a>, an Open Source Qt5 / OpenGL 3.0+ SDR and signal analyzer frontend to various hardware.
qrtplib
rtprandomurandom.cpp
Go to the documentation of this file.
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/*
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This file is a part of JRTPLIB
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Copyright (c) 1999-2017 Jori Liesenborgs
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Contact: jori.liesenborgs@gmail.com
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This library was developed at the Expertise Centre for Digital Media
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(http://www.edm.uhasselt.be), a research center of the Hasselt University
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(http://www.uhasselt.be). The library is based upon work done for
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my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#include "
rtprandomurandom.h
"
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#include "
rtperrors.h
"
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#include <Qt>
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#include <cstdio>
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namespace
qrtplib
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{
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RTPRandomURandom::RTPRandomURandom
()
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{
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device
= 0;
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}
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RTPRandomURandom::~RTPRandomURandom
()
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{
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if
(
device
) {
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fclose(
device
);
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}
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}
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int
RTPRandomURandom::Init
()
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{
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if
(
device
) {
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return
ERR_RTP_RTPRANDOMURANDOM_ALREADYOPEN
;
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}
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device
= fopen(
"/dev/urandom"
,
"rb"
);
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if
(
device
== 0) {
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return
ERR_RTP_RTPRANDOMURANDOM_CANTOPEN
;
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}
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return
0;
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}
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uint8_t
RTPRandomURandom::GetRandom8
()
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{
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if
(!
device
)
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{
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qWarning(
"RTPRandomURandom::GetRandom8: no device"
);
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return
0;
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}
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uint8_t
value;
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if
(fread(&value, 1,
sizeof
(
uint8_t
),
device
) !=
sizeof
(
uint8_t
))
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{
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qWarning(
"RTPRandomURandom::GetRandom8: cannot read unsigned 8 bit value from device"
);
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return
0;
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}
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return
value;
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}
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uint16_t
RTPRandomURandom::GetRandom16
()
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{
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if
(!
device
)
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{
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qWarning(
"RTPRandomURandom::GetRandom16: no device"
);
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return
0;
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}
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uint16_t
value;
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if
(fread(&value, 1,
sizeof
(
uint16_t
),
device
) !=
sizeof
(
uint16_t
))
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{
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qWarning(
"RTPRandomURandom::GetRandom16: cannot read unsigned 16 bit value from device"
);
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return
0;
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}
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return
value;
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}
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uint32_t
RTPRandomURandom::GetRandom32
()
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{
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if
(!
device
)
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{
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qWarning(
"RTPRandomURandom::GetRandom32: no device"
);
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return
0;
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}
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uint32_t
value;
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if
(fread(&value, 1,
sizeof
(
uint32_t
),
device
) !=
sizeof
(
uint32_t
))
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{
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qWarning(
"RTPRandomURandom::GetRandom32: cannot read unsigned 32 bit value from device"
);
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return
0;
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}
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return
value;
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}
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double
RTPRandomURandom::GetRandomDouble
()
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{
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if
(!
device
)
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{
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qWarning(
"RTPRandomURandom::GetRandomDouble: no device"
);
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return
0;
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}
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uint64_t
value;
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if
(fread(&value, 1,
sizeof
(
uint64_t
),
device
) !=
sizeof
(
uint64_t
))
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{
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qWarning(
"RTPRandomURandom::GetRandomDouble: cannot read unsigned 64 bit value from device"
);
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return
0;
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}
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value &= 0x7fffffffffffffffULL;
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int64_t
value2 = (
int64_t
) value;
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double
x =
RTPRANDOM_2POWMIN63
* (double) value2;
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return
x;
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}
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}
// end namespace
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ERR_RTP_RTPRANDOMURANDOM_CANTOPEN
#define ERR_RTP_RTPRANDOMURANDOM_CANTOPEN
Definition:
rtperrors.h:188
rtperrors.h
qrtplib::RTPRandomURandom::RTPRandomURandom
RTPRandomURandom()
Definition:
rtprandomurandom.cpp:41
RTPRANDOM_2POWMIN63
#define RTPRANDOM_2POWMIN63
Definition:
rtprandom.h:47
qrtplib::RTPRandomURandom::GetRandom16
uint16_t GetRandom16()
Definition:
rtprandomurandom.cpp:87
rtprandomurandom.h
ERR_RTP_RTPRANDOMURANDOM_ALREADYOPEN
#define ERR_RTP_RTPRANDOMURANDOM_ALREADYOPEN
Definition:
rtperrors.h:189
int64_t
__int64 int64_t
Definition:
rtptypes_win.h:47
uint32_t
unsigned int uint32_t
Definition:
rtptypes_win.h:46
qrtplib::RTPRandomURandom::GetRandom8
uint8_t GetRandom8()
Definition:
rtprandomurandom.cpp:68
qrtplib::RTPRandomURandom::device
FILE * device
Definition:
rtprandomurandom.h:65
uint8_t
unsigned char uint8_t
Definition:
rtptypes_win.h:42
uint16_t
unsigned short uint16_t
Definition:
rtptypes_win.h:44
qrtplib::RTPRandomURandom::~RTPRandomURandom
~RTPRandomURandom()
Definition:
rtprandomurandom.cpp:46
qrtplib::RTPRandomURandom::GetRandomDouble
double GetRandomDouble()
Definition:
rtprandomurandom.cpp:125
qrtplib
Definition:
rtcpapppacket.cpp:35
qrtplib::RTPRandomURandom::GetRandom32
uint32_t GetRandom32()
Definition:
rtprandomurandom.cpp:106
qrtplib::RTPRandomURandom::Init
int Init()
Definition:
rtprandomurandom.cpp:53
uint64_t
unsigned __int64 uint64_t
Definition:
rtptypes_win.h:48
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