btllib::BlindNtHash Class Reference

`#include <nthash.hpp>`

## Public Member Functions

| BlindNtHash (const char *seq, size_t seq_len, unsigned hash_num, unsigned k, size_t pos=0)
| BlindNtHash (const std::string &seq, unsigned hash_num, unsigned k, size_t pos=0)
| BlindNtHash (const BlindNtHash &nthash)
| BlindNtHash (BlindNtHash &&)=default
bool | roll (char char_in)
bool | roll_back (char char_in)
bool | peek (char char_in)
bool | peek_back (char char_in)
void | sub (const std::vector< unsigned > &positions, const std::vector< unsigned char > &new_bases)
const uint64_t * | hashes () const
size_t | get_pos () const
bool | forward () const
unsigned | get_hash_num () const
unsigned | get_k () const
uint64_t | get_forward_hash () const
uint64_t | get_reverse_hash () const
void | change_seq (const std::string &new_seq, size_t new_pos=0)

## Detailed Description

Similar to NtHash class, but instead of rolling on a predefined sequence, BlindNtHash needs to be fed the new character on each roll. This is useful when traversing an implicit de Bruijn Graph, as we need to query all bases to know the possible extensions.

## Constructor & Destructor Documentation

## BlindNtHash() [1/2]

btllib::BlindNtHash::BlindNtHash | ( | const char * | seq,
|  | size_t | seq_len,
|  | unsigned | hash_num,
|  | unsigned | k,
|  | size_t | pos = `0`
| ) |  |

Constructor.

Parameters

  seq | C string of DNA sequence to start hashing from.
  seq_len | Length of seq.
  hash_num | Number of hashes to produce per k-mer.
  k | K-mer size.
  pos | Position in seq to start hashing from.

## BlindNtHash() [2/2]

btllib::BlindNtHash::BlindNtHash | ( | const std::string & | seq,
|  | unsigned | hash_num,
|  | unsigned | k,
|  | size_t | pos = `0`
| ) |  |

Constructor.

Parameters

  seq | String of DNA sequence to start hashing from.
  hash_num | Number of hashes to produce per k-mer.
  k | K-mer size.
  pos | Position in seq to start hashing from.

## Member Function Documentation

## get_pos()

size_t btllib::BlindNtHash::get_pos | ( |  | ) | const

inline

Get the position of last hashed k-mer or the k-mer to be hashed if roll() has never been called on this NtHash object.

## peek()

bool btllib::BlindNtHash::peek | ( | char | char_in | ) |

Like NtHash::peek(), but as if roll(char char_in) was called.

Returns
  true on success and false otherwise.

## peek_back()

bool btllib::BlindNtHash::peek_back | ( | char | char_in | ) |

Like peek(char char_in), but as if roll_back(char char_in) was called.

Returns
  true on success and false otherwise.

## roll()

bool btllib::BlindNtHash::roll | ( | char | char_in | ) |

Like the NtHash::roll() function, but instead of advancing in the sequence BlindNtHash object was constructed on, the provided character `char_in` is used as the next base. Useful if you want to query for possible paths in an implicit de Bruijn graph graph.

Returns
  true on success and false otherwise.

## roll_back()

bool btllib::BlindNtHash::roll_back | ( | char | char_in | ) |

Like the roll(char char_in) function, but advance backwards.

Returns
  true on success and false otherwise.

The documentation for this class was generated from the following file:

- include/btllib/nthash.hpp