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|
exception Syntax_error of ((int * int) option * string)
external lex_numeric_compare: string -> string -> int = "caml_lex_numeric_compare"
external length : string -> int = "%string_length"
external unsafe_get : string -> int -> char = "%string_unsafe_get"
external char_code: char -> int = "%identity"
external char_chr: int -> char = "%identity"
module B = Bytes
let bts = B.unsafe_to_string
let bos = B.unsafe_of_string
let get_lexing_position lexbuf =
let p = Lexing.lexeme_start_p lexbuf in
let line_number = p.Lexing.pos_lnum in
let column = p.Lexing.pos_cnum - p.Lexing.pos_bol + 1 in
(line_number, column)
(* Modification of Bytes.escaped to leave UTF-8 bytes unescaped *)
let escape_bytes s =
let char_code_zero = 48 in
let high_bit_set = 128 in
let n = ref 0 in
for i = 0 to B.length s - 1 do
n := !n +
(match B.unsafe_get s i with
| '\"' | '\\' | '\n' | '\t' | '\r' | '\b' -> 2
| ' ' .. '~' -> 1
| c when (char_code c >= high_bit_set) -> 1
| _ -> 4)
done;
if !n = B.length s then B.copy s else begin
let s' = B.create !n in
n := 0;
for i = 0 to B.length s - 1 do
begin match B.unsafe_get s i with
| ('\"' | '\\') as c ->
B.unsafe_set s' !n '\\'; incr n; B.unsafe_set s' !n c
| '\n' ->
B.unsafe_set s' !n '\\'; incr n; B.unsafe_set s' !n 'n'
| '\t' ->
B.unsafe_set s' !n '\\'; incr n; B.unsafe_set s' !n 't'
| '\r' ->
B.unsafe_set s' !n '\\'; incr n; B.unsafe_set s' !n 'r'
| '\b' ->
B.unsafe_set s' !n '\\'; incr n; B.unsafe_set s' !n 'b'
| (' ' .. '~') as c -> B.unsafe_set s' !n c
| c when (char_code c >= high_bit_set ) -> B.unsafe_set s' !n c
| c ->
let a = char_code c in
B.unsafe_set s' !n '\\';
incr n;
B.unsafe_set s' !n (char_chr (char_code_zero + a / 100));
incr n;
B.unsafe_set s' !n (char_chr (char_code_zero + (a / 10) mod 10));
incr n;
B.unsafe_set s' !n (char_chr (char_code_zero + a mod 10));
end;
incr n
done;
s'
end
(* Modification of String.escaped to leave UTF-8 bytes unescaped *)
let escape_string s =
let rec escape_if_needed s n i =
if i >= n then s else
match unsafe_get s i with
| '\"' | '\\' | '\000'..'\031' | '\127' ->
bts (escape_bytes (bos s))
| _ -> escape_if_needed s n (i+1)
in
escape_if_needed s (length s) 0
let default default_value opt =
match opt with
| None -> default_value
| Some value -> value
let lexical_numeric_compare s t =
lex_numeric_compare s t
(** Convert a relative path to an absolute path based on the current working directory *)
let absolute_path relative_path =
FilePath.make_absolute (Sys.getcwd ()) relative_path
|
