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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/random__gen_8cpp_source.html below:

NCBI C++ ToolKit: src/util/random_gen.cpp Source File

83 #if defined(NCBI_OS_UNIX) || defined(NCBI_OS_DARWIN) 85  #include <sys/types.h> 90 #elif defined(NCBI_OS_MSWIN) 100 #if defined(NCBI_OS_UNIX) || defined(NCBI_OS_DARWIN) 124 

{

return m_Fd

!= -1; }

130  "System-dependent generator is not available"

);

142  string

(

"Error getting random value from the " 143  "system-dependent generator: "

) +

152 #elif defined(NCBI_OS_MSWIN) 158

m_Provider(0), m_Initialized(

false

)

160  static DWORD

providers[] =

161

{ PROV_RSA_AES, PROV_RSA_FULL, PROV_RSA_SIG,

162

PROV_RSA_SCHANNEL, PROV_DSS, PROV_DSS_DH,

163

PROV_DH_SCHANNEL, PROV_FORTEZZA,

164

PROV_MS_EXCHANGE, PROV_SSL };

165  for

(

size_t

k = 0; k <

sizeof

(providers)/

sizeof

(providers[0]); ++k) {

166  if

(CryptAcquireContext(&m_Provider, 0, 0, providers[k],

167

CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {

168

m_Initialized =

true

;

176

CryptReleaseContext(m_Provider, 0);

177

m_Initialized =

false

;

182 

{

return

m_Initialized; }

188  reinterpret_cast<

PBYTE

>

(

value

)))

191  if

(throw_on_error) {

194  "System-dependent generator is not available"

);

197  string

(

"Error getting random value from the " 198  "system-dependent generator. Error code: "

) +

205

HCRYPTPROV m_Provider;

221  "System-dependent generator is not available"

);

228

m_RandMethod(eGetRand_LFG)

238  "CRandom::Reset() is not allowed for " 239  "system-dependent generator"

);

243

0xd53f1852, 0xdfc78b83, 0x4f256096, 0xe643df7,

244

0x82c359bf, 0xc7794dfa, 0xd5e9ffaa, 0x2c8cb64a,

245

0x2f07b334, 0xad5a7eb5, 0x96dc0cde, 0x6fc24589,

246

0xa5853646, 0xe71576e2, 0xdae30df, 0xb09ce711,

247

0x5e56ef87, 0x4b4b0082, 0x6f4f340e, 0xc5bb17e8,

248

0xd788d765, 0x67498087, 0x9d7aba26, 0x261351d4,

249

0x411ee7ea, 0x393a263, 0x2c5a5835, 0xc115fcd8,

250

0x25e9132c, 0xd0c6e906, 0xc2bc5b2d, 0x6c065c98,

291  "CRandom::SetSeed(...) is not allowed for " 292  "system-dependent generator"

);

316  "CRandom::GetSeed(...) is not allowed for " 317  "system-dependent generator"

);

340  while

(

size

<<= 1 ) {

350

}

while

( bits >

r

-

size

);

Exceptions generated by CRandom class.

bool IsInitialized(void) const

bool GetRand(CRandom::TValue *value, bool throw_on_error)

#define NCBI_THROW(exception_class, err_code, message)

Generic macro to throw an exception, given the exception class, error code and message string.

uint32_t Uint4

4-byte (32-bit) unsigned integer

uint64_t Uint8

8-byte (64-bit) unsigned integer

static TPid GetPid(void)

Get process identifier (pid) for the current process.

TValue m_State[kStateSize]

Uint4 TValue

Type of the generated integer value and/or the seed value.

EGetRandMethod m_RandMethod

TValue GetRand(void)

Get the next random number in the interval [0..GetMax()] (inclusive)

TValue GetRandIndex(TValue size)

Get random number in the interval [0..size-1] (e.g.

Uint8 GetRandUint8(void)

Get random Uint8 number.

Uint8 GetRandIndexUint8(Uint8 size)

Get random number in the interval [0..size-1] (e.g.

CRandom(EGetRandMethod method=eGetRand_LFG)

If "method" is:

TValue GetSeed(void) const

Get the last set seed (LFG only)

void SetSeed(TValue seed)

Seed the random number generator with "seed".

EGetRandMethod

Random generator to use in the GetRand() functions.

void Reset(void)

Reset random number generator to initial startup condition (LFG only)

void Randomize(void)

Re-initialize (re-seed) the generator using platform-specific randomization.

TValue x_GetSysRand32Bits(void) const

@ eGetRand_Sys

Use system-dependent random generator.

#define END_NCBI_SCOPE

End previously defined NCBI scope.

#define BEGIN_NCBI_SCOPE

Define ncbi namespace.

static enable_if< is_arithmetic< TNumeric >::value||is_convertible< TNumeric, Int8 >::value, string >::type NumericToString(TNumeric value, TNumToStringFlags flags=0, int base=10)

Convert numeric value to string.

long NanoSecond(void) const

Get nano-seconds.

int Second(void) const

Get second.

@ eCurrent

Use current time. See also CCurrentTime.

const struct ncbi::grid::netcache::search::fields::SIZE size

const GenericPointer< typename T::ValueType > T2 value

Defines process management classes.

Static variables safety - create on demand, destroy on application termination.

Defines NCBI C++ diagnostic APIs, classes, and macros.

Multi-threading – classes, functions, and features.

Defines: CTimeFormat - storage class for time format.

double r(size_t dimension_, const Int4 *score_, const double *prob_, double theta_)

static CSafeStatic< CRandomSupplier > s_RandomSupplier

static const char * kHardwareGeneratorDevice

static const char * kSoftwareGeneratorDevice

static const size_t kStateOffset


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