144 lines
3.8 KiB
OCaml
144 lines
3.8 KiB
OCaml
type t = <
|
|
byte : Lexing.position;
|
|
point_num : int;
|
|
point_bol : int;
|
|
file : string;
|
|
line : int;
|
|
|
|
set_file : string -> t;
|
|
set_line : int -> t;
|
|
set_offset : int -> t;
|
|
set : file:string -> line:int -> offset:int -> t;
|
|
new_line : string -> t;
|
|
add_nl : t;
|
|
|
|
shift_bytes : int -> t;
|
|
shift_one_uchar : int -> t;
|
|
|
|
offset : [`Byte | `Point] -> int;
|
|
column : [`Byte | `Point] -> int;
|
|
|
|
line_offset : [`Byte | `Point] -> int;
|
|
byte_offset : int;
|
|
|
|
is_ghost : bool;
|
|
|
|
to_string : ?offsets:bool -> [`Byte | `Point] -> string;
|
|
compact : ?offsets:bool -> [`Byte | `Point] -> string;
|
|
anonymous : ?offsets:bool -> [`Byte | `Point] -> string
|
|
>
|
|
|
|
type pos = t
|
|
|
|
(* Constructors *)
|
|
|
|
let sprintf = Printf.sprintf
|
|
|
|
let make ~byte ~point_num ~point_bol =
|
|
let () = assert (point_num >= point_bol) in
|
|
object (self)
|
|
val byte = byte
|
|
method byte = byte
|
|
|
|
val point_num = point_num
|
|
method point_num = point_num
|
|
|
|
val point_bol = point_bol
|
|
method point_bol = point_bol
|
|
|
|
method set_file file =
|
|
{< byte = Lexing.{byte with pos_fname = file} >}
|
|
|
|
method set_line line =
|
|
{< byte = Lexing.{byte with pos_lnum = line} >}
|
|
|
|
method set_offset offset =
|
|
{< byte = Lexing.{byte with pos_cnum = byte.pos_bol + offset} >}
|
|
|
|
method set ~file ~line ~offset =
|
|
let pos = self#set_file file in
|
|
let pos = pos#set_line line in
|
|
let pos = pos#set_offset offset
|
|
in pos
|
|
|
|
(* The string must not contain '\n'. See [new_line]. *)
|
|
|
|
method shift_bytes len =
|
|
{< byte = Lexing.{byte with pos_cnum = byte.pos_cnum + len};
|
|
point_num = point_num + len >}
|
|
|
|
method shift_one_uchar len =
|
|
{< byte = Lexing.{byte with pos_cnum = byte.pos_cnum + len};
|
|
point_num = point_num + 1 >}
|
|
|
|
method add_nl =
|
|
{< byte = Lexing.{byte with
|
|
pos_lnum = byte.pos_lnum + 1;
|
|
pos_bol = byte.pos_cnum};
|
|
point_bol = point_num >}
|
|
|
|
method new_line string =
|
|
let len = String.length string
|
|
in (self#shift_bytes len)#add_nl
|
|
|
|
method is_ghost = byte = Lexing.dummy_pos
|
|
|
|
method file = byte.Lexing.pos_fname
|
|
|
|
method line = byte.Lexing.pos_lnum
|
|
|
|
method offset = function
|
|
`Byte -> Lexing.(byte.pos_cnum - byte.pos_bol)
|
|
| `Point -> point_num - point_bol
|
|
|
|
method column mode = 1 + self#offset mode
|
|
|
|
method line_offset = function
|
|
`Byte -> byte.Lexing.pos_bol
|
|
| `Point -> point_bol
|
|
|
|
method byte_offset = byte.Lexing.pos_cnum
|
|
|
|
method to_string ?(offsets=true) mode =
|
|
let offset = self#offset mode in
|
|
let horizontal, value =
|
|
if offsets then "character", offset else "column", offset + 1
|
|
in sprintf "File \"%s\", line %i, %s %i"
|
|
self#file self#line horizontal value
|
|
|
|
method compact ?(offsets=true) mode =
|
|
if self#is_ghost then "ghost"
|
|
else
|
|
let offset = self#offset mode in
|
|
sprintf "%s:%i:%i"
|
|
self#file self#line (if offsets then offset else offset + 1)
|
|
|
|
method anonymous ?(offsets=true) mode =
|
|
if self#is_ghost then "ghost"
|
|
else sprintf "%i:%i" self#line
|
|
(if offsets then self#offset mode else self#column mode)
|
|
end
|
|
|
|
let from_byte byte =
|
|
let point_num = byte.Lexing.pos_cnum
|
|
and point_bol = byte.Lexing.pos_bol
|
|
in make ~byte ~point_num ~point_bol
|
|
|
|
let ghost = make ~byte:Lexing.dummy_pos ~point_num:(-1) ~point_bol:(-1)
|
|
|
|
let min =
|
|
let byte = Lexing.{
|
|
pos_fname = "";
|
|
pos_lnum = 1;
|
|
pos_bol = 0;
|
|
pos_cnum = 0}
|
|
in make ~byte ~point_num:0 ~point_bol:0
|
|
|
|
(* Comparisons *)
|
|
|
|
let equal pos1 pos2 =
|
|
pos1#file = pos2#file && pos1#byte_offset = pos2#byte_offset
|
|
|
|
let lt pos1 pos2 =
|
|
pos1#file = pos2#file && pos1#byte_offset < pos2#byte_offset
|