package tezos-base

You can search for identifiers within the package.

in-package search v0.2.0

package tezos-base

tezos-base
- Tezos_base
  - Block_header
  - Block_locator
  - Bounded
    
    BOUNDS
    
    Int16
    
    B
    
    Int31
    
    B
    
    Int32
    
    B
    
    Int64
    
    B
    
    Int8
    
    B
    
    Non_negative_int32
    
    S
    
    Uint16
    
    B
    
    Uint8
    
    B
  - Dal_srs
  - Data_encoding_wrapper
  - Distributed_db_version
    
    Name
  - Fitness
  - Genesis
    
    Parameters
  - Internal_event_config
  - Mempool
  - Network_version
  - Operation
  - P2p_addr
  - P2p_connection
    
    Id
    
    Info
    
    Map
    
    P2p_event
    
    Set
    
    Table
  - P2p_identity
  - P2p_peer
    
    Error_table
    
    Filter
    
    Info
    
    Pool_event
    
    State
  - P2p_peer_id
    
    Error_table
    
    Map
    
    Set
    
    Table
    
    WeakRingTable
    
    H
  - P2p_point
    
    Filter
    
    Id
    
    Info
    
    Map
    
    Pool_event
    
    Set
    
    State
    
    Table
  - P2p_rejection
  - P2p_stat
  - P2p_version
  - Point_parser
  - Protocol
    
    Meta
  - S
    
    HASHABLE
    
    T
  - Sized
    
    MakeSizedMap
    
    Map
    
    MakeSizedSet
    
    Set
    
    SizedMap
    
    SizedSet
  - Test_chain_status
  - Time
    
    Protocol
    
    System
    
    Map
    
    Set
    
    Span
    
    Table
  - TzPervasives
    
    Bytes
    
    Empty
    
    Filename
    
    Infix
    
    Legacy_monad_globals
    
    List
    
    Lwt_result_syntax
    
    Lwt_syntax
    
    Result_syntax
    
    String
    
    Hashtbl
    
    Map
    
    Set
    
    TzTrace
    
    Wrapped_error_monad
  - User_activated
  - Worker_intf
    
    NAME
    
    REQUEST
    
    TYPES
    
    VIEW
  - Worker_types
tezos-base.unix
- Tezos_base_unix

Legend:
Library
Module
Module type
Parameter
Class
Class type

include module type of String

Strings

type t = string

The type for strings.

val make : int -> char -> string

make n c is a string of length n with each index holding the character c.

raises Invalid_argument
if n < 0 or n > Sys.max_string_length.

val init : int -> (int -> char) -> string

init n f is a string of length n with index i holding the character f i (called in increasing index order).

raises Invalid_argument
if n < 0 or n > Sys.max_string_length.

since 4.02

val empty : string

The empty string.

since 4.13

val length : string -> int

length s is the length (number of bytes/characters) of s.

val get : string -> int -> char

get s i is the character at index i in s. This is the same as writing s.[i].

raises Invalid_argument
if i not an index of s.

val of_bytes : bytes -> string

Return a new string that contains the same bytes as the given byte sequence.

since 4.13

val to_bytes : string -> bytes

Return a new byte sequence that contains the same bytes as the given string.

since 4.13

val blit : string -> int -> bytes -> int -> int -> unit

Same as Bytes.blit_string which should be preferred.

Concatenating

Note. The Stdlib.(^) binary operator concatenates two strings.

val concat : string -> string list -> string

concat sep ss concatenates the list of strings ss, inserting the separator string sep between each.

raises Invalid_argument
if the result is longer than Sys.max_string_length bytes.

val cat : string -> string -> string

cat s1 s2 concatenates s1 and s2 (s1 ^ s2).

raises Invalid_argument
if the result is longer than Sys.max_string_length bytes.

since 4.13

Predicates and comparisons

val equal : t -> t -> bool

equal s0 s1 is true if and only if s0 and s1 are character-wise equal.

since 4.03 (4.05 in StringLabels)

val compare : t -> t -> int

compare s0 s1 sorts s0 and s1 in lexicographical order. compare behaves like Stdlib.compare on strings but may be more efficient.

val starts_with : prefix:string -> string -> bool

starts_with ~prefix s is true if and only if s starts with prefix.

since 4.13

val ends_with : suffix:string -> string -> bool

ends_with ~suffix s is true if and only if s ends with suffix.

since 4.13

val contains_from : string -> int -> char -> bool

contains_from s start c is true if and only if c appears in s after position start.

raises Invalid_argument
if start is not a valid position in s.

val rcontains_from : string -> int -> char -> bool

rcontains_from s stop c is true if and only if c appears in s before position stop+1.

raises Invalid_argument
if stop < 0 or stop+1 is not a valid position in s.

val contains : string -> char -> bool

contains s c is String.contains_from s 0 c.

Extracting substrings

val sub : string -> int -> int -> string

sub s pos len is a string of length len, containing the substring of s that starts at position pos and has length len.

raises Invalid_argument
if pos and len do not designate a valid substring of s.

val split_on_char : char -> string -> string list

split_on_char sep s is the list of all (possibly empty) substrings of s that are delimited by the character sep.

The function's result is specified by the following invariants:

The list is not empty.
Concatenating its elements using sep as a separator returns a string equal to the input (concat (make 1 sep) (split_on_char sep s) = s).
No string in the result contains the sep character.

since 4.04 (4.05 in StringLabels)

Transforming

val map : (char -> char) -> string -> string

map f s is the string resulting from applying f to all the characters of s in increasing order.

since 4.00

val mapi : (int -> char -> char) -> string -> string

mapi f s is like map but the index of the character is also passed to f.

since 4.02

val fold_right : (char -> 'acc -> 'acc) -> string -> 'acc -> 'acc

fold_right f s x computes f s.[0] (f s.[1] ( ... (f s.[n-1] x) ...)), where n is the length of the string s.

since 4.13

val for_all : (char -> bool) -> string -> bool

for_all p s checks if all characters in s satisfy the predicate p.

since 4.13

val exists : (char -> bool) -> string -> bool

exists p s checks if at least one character of s satisfies the predicate p.

since 4.13

val trim : string -> string

trim s is s without leading and trailing whitespace. Whitespace characters are: ' ', '\x0C' (form feed), '\n', '\r', and '\t'.

since 4.00

val escaped : string -> string

escaped s is s with special characters represented by escape sequences, following the lexical conventions of OCaml.

All characters outside the US-ASCII printable range [0x20;0x7E] are escaped, as well as backslash (0x2F) and double-quote (0x22).

The function Scanf.unescaped is a left inverse of escaped, i.e. Scanf.unescaped (escaped s) = s for any string s (unless escaped s fails).

raises Invalid_argument
if the result is longer than Sys.max_string_length bytes.

val uppercase_ascii : string -> string

uppercase_ascii s is s with all lowercase letters translated to uppercase, using the US-ASCII character set.

since 4.03 (4.05 in StringLabels)

val lowercase_ascii : string -> string

lowercase_ascii s is s with all uppercase letters translated to lowercase, using the US-ASCII character set.

since 4.03 (4.05 in StringLabels)

val capitalize_ascii : string -> string

capitalize_ascii s is s with the first character set to uppercase, using the US-ASCII character set.

since 4.03 (4.05 in StringLabels)

val uncapitalize_ascii : string -> string

uncapitalize_ascii s is s with the first character set to lowercase, using the US-ASCII character set.

since 4.03 (4.05 in StringLabels)

Traversing

val iter : (char -> unit) -> string -> unit

iter f s applies function f in turn to all the characters of s. It is equivalent to f s.[0]; f s.[1]; ...; f s.[length s - 1]; ().

val iteri : (int -> char -> unit) -> string -> unit

iteri is like iter, but the function is also given the corresponding character index.

since 4.00

Searching

val index_from : string -> int -> char -> int

index_from s i c is the index of the first occurrence of c in s after position i.

raises Not_found
if c does not occur in s after position i.

raises Invalid_argument
if i is not a valid position in s.

val index_from_opt : string -> int -> char -> int option

index_from_opt s i c is the index of the first occurrence of c in s after position i (if any).

raises Invalid_argument
if i is not a valid position in s.

since 4.05

val rindex_from : string -> int -> char -> int

rindex_from s i c is the index of the last occurrence of c in s before position i+1.

raises Not_found
if c does not occur in s before position i+1.

raises Invalid_argument
if i+1 is not a valid position in s.

val rindex_from_opt : string -> int -> char -> int option

rindex_from_opt s i c is the index of the last occurrence of c in s before position i+1 (if any).

raises Invalid_argument
if i+1 is not a valid position in s.

since 4.05

val index : string -> char -> int

index s c is String.index_from s 0 c.

val index_opt : string -> char -> int option

index_opt s c is String.index_from_opt s 0 c.

since 4.05

val rindex : string -> char -> int

rindex s c is String.rindex_from s (length s - 1) c.

val rindex_opt : string -> char -> int option

rindex_opt s c is String.rindex_from_opt s (length s - 1) c.

since 4.05

Strings and Sequences

val to_seq : t -> char Seq.t

to_seq s is a sequence made of the string's characters in increasing order. In "unsafe-string" mode, modifications of the string during iteration will be reflected in the sequence.

since 4.07

val to_seqi : t -> (int * char) Seq.t

to_seqi s is like to_seq but also tuples the corresponding index.

since 4.07

val of_seq : char Seq.t -> t

of_seq s is a string made of the sequence's characters.

since 4.07

UTF decoding and validations

since 4.14

UTF-8

val get_utf_8_uchar : t -> int -> Uchar.utf_decode

get_utf_8_uchar b i decodes an UTF-8 character at index i in b.

val is_valid_utf_8 : t -> bool

is_valid_utf_8 b is true if and only if b contains valid UTF-8 data.

UTF-16BE

val get_utf_16be_uchar : t -> int -> Uchar.utf_decode

get_utf_16be_uchar b i decodes an UTF-16BE character at index i in b.

val is_valid_utf_16be : t -> bool

is_valid_utf_16be b is true if and only if b contains valid UTF-16BE data.

UTF-16LE

val get_utf_16le_uchar : t -> int -> Uchar.utf_decode

get_utf_16le_uchar b i decodes an UTF-16LE character at index i in b.

val is_valid_utf_16le : t -> bool

is_valid_utf_16le b is true if and only if b contains valid UTF-16LE data.

Binary decoding of integers

The functions in this section binary decode integers from strings.

All following functions raise Invalid_argument if the characters needed at index i to decode the integer are not available.

Little-endian (resp. big-endian) encoding means that least (resp. most) significant bytes are stored first. Big-endian is also known as network byte order. Native-endian encoding is either little-endian or big-endian depending on Sys.big_endian.

32-bit and 64-bit integers are represented by the int32 and int64 types, which can be interpreted either as signed or unsigned numbers.

8-bit and 16-bit integers are represented by the int type, which has more bits than the binary encoding. These extra bits are sign-extended (or zero-extended) for functions which decode 8-bit or 16-bit integers and represented them with int values.

val get_uint8 : string -> int -> int

get_uint8 b i is b's unsigned 8-bit integer starting at character index i.

since 4.13

val get_int8 : string -> int -> int

get_int8 b i is b's signed 8-bit integer starting at character index i.

since 4.13

val get_uint16_ne : string -> int -> int

get_uint16_ne b i is b's native-endian unsigned 16-bit integer starting at character index i.

since 4.13

val get_uint16_be : string -> int -> int

get_uint16_be b i is b's big-endian unsigned 16-bit integer starting at character index i.

since 4.13

val get_uint16_le : string -> int -> int

get_uint16_le b i is b's little-endian unsigned 16-bit integer starting at character index i.

since 4.13

val get_int16_ne : string -> int -> int

get_int16_ne b i is b's native-endian signed 16-bit integer starting at character index i.

since 4.13

val get_int16_be : string -> int -> int

get_int16_be b i is b's big-endian signed 16-bit integer starting at character index i.

since 4.13

val get_int16_le : string -> int -> int

get_int16_le b i is b's little-endian signed 16-bit integer starting at character index i.

since 4.13

val get_int32_ne : string -> int -> int32

get_int32_ne b i is b's native-endian 32-bit integer starting at character index i.

since 4.13

val hash : t -> int

An unseeded hash function for strings, with the same output value as Hashtbl.hash. This function allows this module to be passed as argument to the functor Hashtbl.Make.

since 5.0

val seeded_hash : int -> t -> int

A seeded hash function for strings, with the same output value as Hashtbl.seeded_hash. This function allows this module to be passed as argument to the functor Hashtbl.MakeSeeded.

since 5.0

val get_int32_be : string -> int -> int32

get_int32_be b i is b's big-endian 32-bit integer starting at character index i.

since 4.13

val get_int32_le : string -> int -> int32

get_int32_le b i is b's little-endian 32-bit integer starting at character index i.

since 4.13

val get_int64_ne : string -> int -> int64

get_int64_ne b i is b's native-endian 64-bit integer starting at character index i.

since 4.13

val get_int64_be : string -> int -> int64

get_int64_be b i is b's big-endian 64-bit integer starting at character index i.

since 4.13

val get_int64_le : string -> int -> int64

get_int64_le b i is b's little-endian 64-bit integer starting at character index i.

since 4.13

include module type of Tezos_stdlib.TzString

val split : char -> ?limit:int -> string -> string list

split delim ~limit str splits str into a list of strings. Splitting occurs on delim characters (which are removed from output) at most limit times. Remaining delim characters are included in the last element of the resulting list.

limit defaults to max_int.

This function obeys the invariant that for all limits, delims and strs: String.concat (String.init 1 (fun _ -> delim)) (split delim ~limit str) = str.

val split_no_empty : char -> ?limit:int -> string -> string list

Splits a string on a delimiter character. It strips delimiters at the beginning and at the end. It considers groups of delimiters as one. If limit is passed, stops after limit split(s). limit defaults to max_int. It's guaranteed to never produce empty strings in the output. Therefore, it's capable of producing an empty list as a result.

For example, split_no_empty ',' ",hello,,world," returns "hello"; "world"

val chunk_bytes : 
  ?error_on_partial_chunk:'a ->
  int ->
  bytes ->
  (string list, 'a) result

chunk_bytes n b chunks the sequence of bytes b into a list of strings, each of length n. The last chunk may be a non-empty string of length less than n, in which case the behaviour of the function depends on whether error_on_partial_chunk is set:

If error_on_partial_chunk is set, then the function returns Error error_on_partial_chunk,
Otherwise, the function return the list of chunks, where the last chunk is a non-empty string of length less than n.

raises Invalid_argument
if n <= 0.

val has_prefix : prefix:string -> string -> bool

true if input has prefix

val remove_prefix : prefix:string -> string -> string option

Some (input with prefix removed), if string has prefix, else None

val remove_suffix : suffix:string -> string -> string option

Some (input with suffix removed), if string has suffix, else None

val common_prefix : string -> string -> int

Length of common prefix of input strings

val mem_char : string -> char -> bool

Test whether a string contains a given character

val fold_left : ('a -> char -> 'a) -> 'a -> string -> 'a

Functional iteration over the characters of a string from first to last

val pp_bytes_hex : Format.formatter -> bytes -> unit

Pretty print bytes as hexadecimal string.

module Hashtbl : 
  Tezos_error_monad.TzLwtreslib.Hashtbl.SeededS with type key = t

module Map : Tezos_error_monad.TzLwtreslib.Map.S with type key = t

module Set : Tezos_error_monad.TzLwtreslib.Set.S with type elt = t