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75 lines
2.6 KiB
OCaml
75 lines
2.6 KiB
OCaml
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(*
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copyright (c) 2013-2014, simon cruanes
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all rights reserved.
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redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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(** {1 Knuth-Morris-Pratt} *)
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module type STRING = sig
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type t
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type char
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val length : t -> int
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val get : t -> int -> char
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val char_equal : char -> char -> bool
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end
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type 'a gen = unit -> 'a option
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type 'a sequence = ('a -> unit) -> unit
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module type S = sig
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type string
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type pattern
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(** Compiled pattern (needle: string to search in another string) *)
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val compile : string -> pattern
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(** Compile a string into a pattern *)
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val find : pattern:pattern -> string -> int -> int option
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(** [find ~pattern s i] finds the next occurrence of [pattern]
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in [s] starting at offset [i], and returns it,
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or returns [None] if the pattern doesn't occur. *)
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val search : pattern:pattern -> string -> int option
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(** [search ~pattern s] is a shortcut for [find ~pattern s 0]. *)
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val find_all : pattern:pattern -> string -> int -> int gen
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(** Generator on all occurrences of the pattern *)
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val seq : pattern:pattern -> string -> int -> int sequence
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(** iterate on matching positions *)
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(** {6 One-shot functions that compile the pattern on-the-fly} *)
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val search' : pattern:string -> string -> int option
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val find_all' : pattern:string -> string -> int gen
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val seq' : pattern:string -> string -> int sequence
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end
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module Make(Str : STRING) : S with type string = Str.t
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include S with type string = string
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