package irmin-pack

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package irmin-pack
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Module
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Parameters

module Fm : File_manager.S with module Io = Io.Unix

Signature

module Fm = Fm
module Mapping_file : Mapping_file.S with module Io = Fm.Io
type t
val v : root:string -> Fm.t -> (t, [> Fm.Errs.t ]) Stdlib.result
val read_exn : t -> off:Optint.Int63.t -> len:int -> bytes -> unit

read_exn either reads in the prefix or the suffix file, depending on off. See Io.read_exn for the arguments. If it tries to read a gced object, an exception is raised.

val read_at_most_exn : t -> off:Optint.Int63.t -> len:int -> bytes -> int

read_at_most_exn is similar to read_exn but if the end of file is reached while reading len bytes, then only the available bytes are read. No `Read_out_of_bounds error is raised. The number of bytes read are returned.

val end_offset : t -> Optint.Int63.t

end_offset is the end offsets of the pack entries, counting that the prefix doesn't start at 0. It counts the entries not yet flushed from the prefix.

val read_if_not_gced : t -> off:Optint.Int63.t -> len:int -> bytes -> bool

Similar to read_exn but returns false if the object was gced, instead of raising an expection.

val offset_of_suffix_off : t -> Optint.Int63.t -> Optint.Int63.t

offset_of_suffix_off t suffix_off converts a suffix offset into a (global) offset.

val read_in_prefix_and_suffix_exn : t -> off:Optint.Int63.t -> len:int -> bytes -> unit

Simlar to read_exn but if off + len is greater than the end of the prefix, it will read the remaining in the prefix.

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