Module Gutf8

Pure ocaml module for conversion between UCS and UTF8

type unichar = int
type unistring = unichar array
val from_unichar : unichar -> string

from_unichar 0xiii converts a code point iii (usually in hexadecimal form) into a string containing the UTF-8 encoded character 0xiii. See unicode.org for charmaps. Does not check that the given code point is a valid unicode point.

val from_unistring : unistring -> string
val to_unichar_validated : string -> pos:int Stdlib.ref -> unichar

to_unichar_validated decodes an UTF-8 encoded code point and checks for incomplete characters, invalid characters and overlong encodings.

  • raises Convert.Error

    if invalid

val to_unichar : string -> pos:int Stdlib.ref -> unichar

to_unichar decodes an UTF-8 encoded code point. Result is undefined if pos does not point to a valid UTF-8 encoded character.

val to_unistring : string -> unistring

to_unistring decodes an UTF-8 encoded string into an array of unichar. The string must be valid.

val first_char : string -> unichar

first_char returns the first UTF-8 encoded code point.

val next : string -> pos:int -> int

next returns the position of the code point following the one at pos.

val length : string -> int

length returns the number of code-points in the UTF-8 encode string

module Error : sig ... end

to_unichar_validated may raise PARTIAL_INPUT or ILLEGAL_SEQUENCE