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Fabcoin Core
0.16.2
P2P Digital Currency
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Fabcoin Core
0.16.2
P2P Digital Currency
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Mersenne Twister class for Monte-Carlo simulations. More...
#include <mersenne.h>
Public Member Functions | |
| MersenneTwister (unsigned long seed=S) | |
| Construct a Mersenne Twister. More... | |
| void | GenerateBlock (byte *output, size_t size) |
| Generate random array of bytes. More... | |
| word32 | GenerateWord32 (word32 min=0, word32 max=0xffffffffL) |
| Generate a random 32-bit word in the range min to max, inclusive. More... | |
| void | DiscardBytes (size_t n) |
| Generate and discard n bytes. More... | |
 Public Member Functions inherited from RandomNumberGenerator | |
| virtual | ~RandomNumberGenerator () |
| virtual void | IncorporateEntropy (const byte *input, size_t length) |
| Update RNG state with additional unpredictable values. More... | |
| virtual bool | CanIncorporateEntropy () const |
| Determines if a generator can accept additional entropy. More... | |
| virtual byte | GenerateByte () |
| Generate new random byte and return it. More... | |
| virtual unsigned int | GenerateBit () |
| Generate new random bit and return it. More... | |
| virtual void | GenerateIntoBufferedTransformation (BufferedTransformation &target, const std::string &channel, lword length) |
| Generate random bytes into a BufferedTransformation. More... | |
| template<class IT > | |
| void | Shuffle (IT begin, IT end) |
| Randomly shuffle the specified array. More... | |
| Public Member Functions inherited from Algorithm | |
| virtual | ~Algorithm () |
| Algorithm (bool checkSelfTestStatus=true) | |
| Interface for all crypto algorithms. More... | |
| virtual std::string | AlgorithmName () const |
| Provides the name of this algorithm. More... | |
| Public Member Functions inherited from Clonable | |
| virtual | ~Clonable () |
| virtual Clonable * | Clone () const |
| Copies this object. More... | |
Protected Member Functions | |
| word32 | NextMersenneWord () |
| Returns the next 32-bit word from the state array. More... | |
| void | Twist () |
| Performs the twist operaton on the state array. More... | |
Private Attributes | |
| FixedSizeSecBlock< word32, N+1 > | m_state |
| 32-bit word state array of size N More... | |
| unsigned int | m_seed |
| the value used to seed the generator More... | |
| unsigned int | m_idx |
| the current index into the state array More... | |
Mersenne Twister class for Monte-Carlo simulations.
| K | Magic constant |
| M | Period parameter |
| N | Size of the state vector |
| F | Multiplier constant |
| S | Initial seed |
Provides the MersenneTwister implementation. The class is a header-only implementation.
Definition at line 31 of file mersenne.h.
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inline |
Construct a Mersenne Twister.
| seed | 32-bit seed |
Defaults to template parameter S due to changing algorithm parameters over time
Definition at line 38 of file mersenne.h.
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inlinevirtual |
Generate and discard n bytes.
| n | the number of bytes to discard, rounded up to a word32 size |
If n is not a multiple of word32, then unused bytes are not accumulated for subsequent calls to GenerateBlock. Rather, the unused tail bytes are discarded, and the stream is continued at the next word32 boundary from the state array.
Reimplemented from RandomNumberGenerator.
Definition at line 120 of file mersenne.h.
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inlinevirtual |
Generate random array of bytes.
| output | byte buffer |
| size | length of the buffer, in bytes |
Bytes are written to output in big endian order. If output length is not a multiple of word32, then unused bytes are not accumulated for subsequent calls to GenerateBlock. Rather, the unused tail bytes are discarded, and the stream is continued at the next word32 boundary from the state array.
Reimplemented from RandomNumberGenerator.
Definition at line 52 of file mersenne.h.
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inlinevirtual |
Generate a random 32-bit word in the range min to max, inclusive.
If the 32-bit candidate is not within the range, then it is discarded and a new candidate is used.
Reimplemented from RandomNumberGenerator.
Definition at line 98 of file mersenne.h.
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inlineprotected |
Returns the next 32-bit word from the state array.
fetches the next word frm the state array, performs bit operations on it, and then returns the value to the caller.
Definition at line 132 of file mersenne.h.
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inlineprotected |
Performs the twist operaton on the state array.
Definition at line 146 of file mersenne.h.
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private |
the current index into the state array
Definition at line 181 of file mersenne.h.
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private |
the value used to seed the generator
Definition at line 179 of file mersenne.h.
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private |
32-bit word state array of size N
Definition at line 177 of file mersenne.h.
1.8.11
