Module Pack.IDec

type error =
| Invalid_header of string

Appear when the header of the IDX file is incorrect.

| Invalid_version of int32

Appear when the version of the IDX file is wrong.

| Invalid_index

Appear when we try to read an area outside the IDX file.

| Expected_bigoffset_table

Appear when we try to read a big offset table and we can't catch it.

| Invalid_bigoffset_index of int

Appear when we try to read a big offset value and we can't catch it.

The type error.

val pp_error : error Fmt.t

Pretty-printer of error.

type t

State of the IDX lzy decoder.

val make : ?⁠cache:int -> Cstruct.t -> (t, error) Stdlib.result

Make a new state from a Cstruct.t buffer. You can specify how many elements we can store to the cache. This function returns the state t or an error.

Indeed, in this function we check if the IDX file stored entirely on the Cstruct.t is well-formed. Otherwise, we return an explicit error.

val find : t -> Hash.t -> (Checkseum.Crc32.t * int64) option

find t hash get the CRC-32 checksum and the absolute offset binded on hash in the IDX file represented by t only if hash exists. Otherwise, it returns None.

val mem : t -> Hash.t -> bool

mem t hash returns true if hash exists in the IDX file represented by t. Otherwise, it returns false.

val iter : t -> (Hash.t -> (Checkseum.Crc32.t * int64) -> unit) -> unit

Iteration in the IDX file.

val fold : t -> (Hash.t -> (Checkseum.Crc32.t * int64) -> 'a -> 'a) -> 'a -> 'a

Fold in the IDX file.

val cardinal : t -> int