package containers

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IO Utils

containers
- CCArray
  - MONO_ARRAY
- CCArrayLabels
  - MONO_ARRAY
- CCArray_slice
- CCBool
- CCChar
- CCEqual
  - Infix
- CCFloat
  - Infix
- CCFormat
  - Dump
- CCFun
  - Monad
    
    X
- CCHash
- CCHashtbl
  - Make
    
    X
  - Poly
  - S
- CCHeap
  - Make
    
    E
  - PARTIAL_ORD
  - S
- CCIO
  - File
- CCInt
  - Infix
- CCInt64
- CCList
  - Assoc
  - Infix
  - MONAD
  - Ref
  - Traverse
    
    M
- CCListLabels
  - Assoc
  - Infix
  - MONAD
  - Ref
  - Traverse
    
    M
- CCMap
  - Make
    
    O
  - S
- CCOpt
  - Infix
- CCOrd
  - Infix
- CCPair
- CCParse
  - Infix
  - U
- CCRandom
  - State
- CCRef
- CCResult
  - Infix
  - MONAD
  - Traverse
    
    M
- CCSet
  - Make
    
    O
  - S
- CCString
  - Find
  - S
  - Split
  - Sub
- CCVector
- Containers
  - Hashtbl
    
    HashedType
    
    MakeSeeded
    
    H
    
    S
    
    SeededHashedType
    
    SeededS
containers.data
- CCBV
- CCBitField
  - Make
    
    X
  - S
- CCCache
- CCDeque
- CCFQueue
- CCGraph
  - Dot
  - Lazy_tree
  - MAP
  - Map
    
    O
  - Seq
  - Traverse
    
    Event
- CCHashSet
  - ELEMENT
  - Make
    
    E
  - S
- CCHashTrie
  - KEY
  - Make
    
    K
  - S
  - Transient
- CCHet
  - Key
  - Map
  - Tbl
- CCImmutArray
- CCIntMap
- CCMixmap
  - Make
    
    X
  - ORD
  - S
- CCMixset
- CCMixtbl
- CCMultiMap
  - BIDIR
  - Make
    
    K
    
    V
  - MakeBidir
    
    L
    
    R
  - OrderedType
  - S
- CCMultiSet
  - Make
    
    O
  - S
- CCPersistentArray
- CCPersistentHashtbl
  - HashedType
  - Make
    
    H
  - S
- CCRAL
  - Infix
- CCRingBuffer
  - Array
    
    Byte
    
    Make
    
    Elt
    
    S
  - Byte
  - Make
    
    Array
    
    X
  - MakeFromArray
    
    A
  - S
    
    Array
- CCSimple_queue
  - Infix
- CCTrie
  - Make
    
    W
  - MakeArray
    
    X
  - MakeList
    
    X
  - ORDERED
  - S
  - String
  - WORD
- CCWBTree
  - KEY
  - Make
    
    X
  - MakeFull
    
    X
  - ORD
  - S
- CCZipper
containers.iter
- CCKList
  - Infix
  - MONAD
  - Traverse
    
    M
- CCKTree
  - Dot
  - pset
- CCLazy_list
  - Infix
containers.monomorphic
- CCMonomorphic
containers.sexp
- CCSexp
  - Decoder
- CCSexp_lex
containers.thread
- CCBlockingQueue
- CCLock
  - LockRef
- CCPool
  - Make
    
    Fut
    
    Infix
    
    P
  - PARAM
- CCSemaphore
- CCThread
  - Arr
  - Barrier
- CCTimer
containers.top
- Containers_top
containers.unix
- CCUnix
  - Infix

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Class type

IO Utils

Simple utilities to deal with basic Input/Output tasks in a resource-safe way. For advanced IO tasks, the user is advised to use something like Lwt or Async, that are far more comprehensive.

Examples:

obtain the list of lines of a file:

# let l = CCIO.(with_in "/tmp/some_file" read_lines);;

transfer one file into another:

# CCIO.(
    with_in "/tmp/input"
      (fun ic ->
         let chunks = read_chunks ic in
         with_out ~flags:[Open_binary] ~mode:0o644 "/tmp/output"
           (fun oc ->
              write_gen oc chunks
           )
      )
  ) ;;

since 0.6

before 0.12
was in 'containers.io', now moved into 'containers'

type 'a or_error = ('a, string) Result.result

type 'a gen = unit -> 'a option

See Gen in the gen library.

Input

val with_in : 
  ?mode:int ->
  ?flags:open_flag list ->
  string ->
  (in_channel -> 'a) ->
  'a

Open an input file with the given optional flag list, calls the function on the input channel. When the function raises or returns, the channel is closed.

raises Sys_error
in case of error (same as open_in and close_in).

parameter flags
opening flags (default [Open_text]). Open_rdonly is used in any cases.

val read_chunks : ?size:int -> in_channel -> string gen

Read the channel's content into chunks of size size.

val read_line : in_channel -> string option

Read a line from the channel. Returns None if the input is terminated. The "\n" is removed from the line.

val read_lines : in_channel -> string gen

Read all lines. The generator should be traversed only once.

val read_lines_l : in_channel -> string list

Read all lines into a list.

val read_all : ?size:int -> in_channel -> string

Read the whole channel into a buffer, then converted into a string.

parameter size
the internal buffer size.

since 0.7

val read_all_bytes : ?size:int -> in_channel -> Bytes.t

Read the whole channel into a mutable byte array.

parameter size
the internal buffer size.

since 0.12

Output

val with_out : 
  ?mode:int ->
  ?flags:open_flag list ->
  string ->
  (out_channel -> 'a) ->
  'a

Like with_in but for an output channel.

parameter flags
opening flags (default [Open_creat; Open_trunc; Open_text]).

raises Sys_error
in case of error (same as open_out and close_out). Open_wronly is used in any cases.

val with_out_a : 
  ?mode:int ->
  ?flags:open_flag list ->
  string ->
  (out_channel -> 'a) ->
  'a

Similar to with_out but with the [Open_append; Open_creat; Open_wronly] flags activated, to append to the file.

raises Sys_error
in case of error (same as open_out and close_out).

val write_line : out_channel -> string -> unit

Write the given string on the channel, followed by "\n".

val write_gen : ?sep:string -> out_channel -> string gen -> unit

Write the given strings on the output. If provided, add sep between every two strings (but not at the end).

val write_lines : out_channel -> string gen -> unit

Write every string on the output, followed by "\n".

val write_lines_l : out_channel -> string list -> unit

Both

val with_in_out : 
  ?mode:int ->
  ?flags:open_flag list ->
  string ->
  (in_channel -> out_channel -> 'a) ->
  'a

Combines with_in and with_out.

parameter flags
opening flags (default [Open_creat]).

raises Sys_error
in case of error.

since 0.12

Misc for Generators

val tee : ('a -> unit) list -> 'a gen -> 'a gen

tee funs gen behaves like gen, but each element is given to every function f in funs at the time the element is produced.

File and file names

How to list recursively files in a directory:

# let files = CCIO.File.read_dir ~recurse:true (CCIO.File.make "/tmp");;
# CCIO.write_lines stdout files;;

See File.walk if you also need to list directories:

# let content = CCIO.File.walk (CCIO.File.make "/tmp");;
# Gen.map CCIO.File.show_walk_item content |> CCIO.write_lines stdout;;

module File : sig ... end