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(* $Id: subText.ml,v 1.2 2004/09/04 16:08:40 yori Exp $ *)
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(* Copyright 2002, 2003 Yamagata Yoriyuki. distributed with LGPL *)
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val get : t -> int -> UChar.t
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val init : int -> (int -> UChar.t) -> t
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val look : t -> index -> UChar.t
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val nth : t -> int -> index
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val first : t -> index
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val next : t -> index -> index
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val prev : t -> index -> index
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val move : t -> index -> int -> index
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val out_of_range : t -> index -> bool
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val compare_index : t -> index -> index -> int
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val iter : (UChar.t -> unit) -> t -> unit
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val compare : t -> t -> int
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val create : int -> buf
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val contents : buf -> t
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val clear : buf -> unit
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val reset : buf -> unit
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val add_char : buf -> UChar.t -> unit
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val add_string : buf -> t -> unit
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val add_buffer : buf -> buf -> unit
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val refer : ur_text -> ur_index -> ur_index -> t
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val excerpt : t -> ur_text
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val context : t -> ur_text * ur_index * ur_index
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val ur_index_of : t -> index -> ur_index
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module Make (Text : UnicodeString.Type) = struct
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type t = Text.t * Text.index * Text.index
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type index = Text.index
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let out_of_range (t, i0, j) i =
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if Text.compare_index t i0 i > 0 then true else
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if Text.compare_index t i j >= 0 then true else
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let look ((t, _, _) as s) i =
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if out_of_range s i then failwith "SubText.look" else
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let next (t, _, j) i = Text.next t i
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let prev (t, j, _) i = Text.prev t i
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let move ((t, _, _) as s) i n = Text.move t i n
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let nth ((t, i, _) as s) n = move s i n
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let first (t, i, _) = i
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let last (t, _, i) = Text.prev t i
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let compare_index (t, _, _) i j = Text.compare_index t i j
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let get s n = look s (nth s n)
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let t = Text.init len f in
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(t, Text.nth t 0, Text.next t (Text.last t))
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let length (t, i, j) =
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if Text.compare_index t i j >= 0 then n else
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loop (Text.next t i) (n + 1) in
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let iter proc (t, i, j) =
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if Text.compare_index t i j >= 0 then () else begin
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let compare (t1, i1, j1) (t2, i2, j2) =
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if Text.compare_index t1 i1 j1 >= 0 then
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if Text.compare_index t2 i2 j2 >= 0 then 0 else ~-1
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else if Text.compare_index t2 i2 j2 >= 0 then 1 else
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let sgn = UChar.compare (Text.look t1 i1) (Text.look t2 i2) in
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loop (Text.next t1 i1) (Text.next t2 i2)
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let add_string buf s = iter (add_char buf) s
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let t = Text.Buf.contents buf in
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(t, Text.nth t 0, Text.next t (Text.last t))
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type ur_text = Text.t
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type ur_index = Text.index
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let refer t i j = (t, i, j)
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let buf = Buf.create 0 in
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Buf.add_string buf s;
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Text.Buf.contents buf
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let ur_index_of _ i = i
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public/subText.ml
