weakhash

Documentation

Index

• Constants
• func Find(ctx context.Context, ir io.Reader, hashesToFind []uint32, size int) (map[uint32][]int64, error)
• type Finder
  • func NewFinder(ctx context.Context, ir io.ReadSeeker, size int, hashesToFind []uint32) (*Finder, error)
  • func (h *Finder) Iterate(hash uint32, buf []byte, iterFunc func(int64) bool) (bool, error)

Constants

const (
	Size = 4
)

Functions

func Find

func Find(ctx context.Context, ir io.Reader, hashesToFind []uint32, size int) (map[uint32][]int64, error)

Find finds all the blocks of the given size within io.Reader that matches the hashes provided, and returns a hash -> slice of offsets within reader map, that produces the same weak hash.

Types

type Finder

type Finder struct {
	// contains filtered or unexported fields
}

func NewFinder

func NewFinder(ctx context.Context, ir io.ReadSeeker, size int, hashesToFind []uint32) (*Finder, error)

func (*Finder) Iterate

func (h *Finder) Iterate(hash uint32, buf []byte, iterFunc func(int64) bool) (bool, error)

Iterate iterates all available blocks that matches the provided hash, reads them into buf, and calls the iterator function. The iterator function should return whether it wishes to continue iterating.